Açiksöz S, Görmüs S, Karadeniz N (2010). Determination of ecotourism potential in national parks: Kure Mountains National Park, Kastamonu-Bartin, Turkey. Afr. J. Agric. Res. 5(8):589-599. 

Bahmanpour H, Laghai HA, Moharamnejad N (2012). Identifying environmental potential and natural attraction for ecotourism development from user viewpoint (Case Study: Shahrood Nature Park, Shahrood – Iran). Eur. J. Exp. Biol. 2(3):616-622.

Charnley S (2005). From nature tourism to ecotourism? The case of the Ngorogoro conservation area, Tanzania. Human Organization. 64(1):75-88.
Crossref

Daniel L, Manning R, Krymkowski D (2005). Relationship between visitor-based standards of quality and existing conditions in parks and outdoor recreation. Leisure Science, 27: 157-173. 
Crossref

Drumm A, Moore A (2005). Ecotourism development: A manual for conservation planners and managers. Volume l: An introduction to ecotourism planning. 2nd edition. USA: USAID.

EGA (2008). Ecotourism as a conservation strategy for funders a background briefing. New York, USA.

Erduran F, CengÄ¡z EO, SaÄŸlik A (2012). Potential ecotourism in the protected area: A case study at KazdaÄŸ (Mt. Ida), Turkey. Afr. J. Agric. Res. 7(11):1772-1781. 
Crossref

Ervin J, Sekhran N, Gidda S, Vergeichik M, Mee J (2010). Protected areas for the 21st century: Lessons from UNDP/GEF's portfolio. UNDP. New York, USA.

EWCA (2012). Maze National Park (MzNP). 

View

Fagence M (2001). Strategies for developing ecotourism in pacific island countries: Presentation to UNESCAP/SPTO seminar on sustainable development of ecotourism in Pacific Island Countries. School of Geography, University of Queensland Suva, Fiji.

Fennell DA (2001). A content analysis of ecotourism definitions. Current Issues in Tourism. 4(5):403-421.
Crossref

Garcia-Herrera JJ (2011). Handbook of ecotourism in protected areas of Vietnam. FUNDESO. Retrieved from http://mekongtourism.org/website/wp-content/uploads/downloads/2011/02/Handbook-of-Ecotourism-in-Protected-Areas-of-Viet-Nam.pdf on Mar 2013

Goodwin JH, Williams NL (2000). Protected area tourism – Distorting conservation priorities towards charismatic mega fauna? In Entwistle A. and Dunstone N. (Eds), Priorities for the conservation of mammalian diversity: Has the panda had its day? Cambridge: Cambridge University Press. pp. 257-275.

Gunn C (2002). Tourism planning - Basics, concepts, cases (4th ed.). New York: Taylor & Francis Books.

Herarty JM (1989). Tourism transport implications for developing countries. Tourism Management. 109(4):272-274.

Hillstrom K, Hillstrom CL (2003). The world's environments: Africa and the Middle East. California, USA: ABC-CLIO, Inc.

IBC (2005). National biodiversity strategy and action plan. Government of the Federal Democratic Republic of Ethiopia. Addis Ababa, Ethiopia.

ILO (2010). Developments and challenges in the hospitality and tourism Inskeep E (1991). Tourism Planning: An Integrated and Sustainable Development Approach. VNR tourism and commercial recreation series, Wiley Publisher.

Kerley GIH, Geach BGS, Vial C (2003). Jumbos or bust: Do tourists' perceptions lead to an under-appreciation of biodiversity? South Afr. J. Wildlife Res. 33(1):13-21.

Kothari RC (2004). Research Methodology: Methods and Techniques. New Delhi, India: New Age International (P) Limited Publishers.

Lee MS, San YH, Hsu YR (2011). A study of the key success factors of the ecotourism industry in Taiwan. Afr. J. Bus. Manage. 5(2):627-640. doi: 10.5897/AJBM10.735

Libreros M (2008). Measuring employment in the tourism industries. UNWTO Workshop on Developing Tourism Statistics and the Tourism Satellite Account Project. UNWTO.

Miles MB, Huberman AM (1994). Qualitative data analysis. London, UK: SAGE publications.

MoCT (2009). Federal Democratic Republic of Ethiopia Tourism Development Policy. Addis Ababa, Ethiopia.

Neba, N. E. (2010). Developing rural tourism as an alternative strategy for poverty alleviation in protected areas: example of Oku, Cameroon. International NGO Journal, 5 (1), 050-059.

Nuva R, Shamsudin MN (2009). Willingness to pay towards the conservation of ecotourism resources at Gunung Gede Pangrango National Park, West Java, Indonesia. J. Sust. Dev. 2(2). doi: 10.5539

Onwuegbuzie AJ, Johnson RB (2006).The validity issue in mixed research. Res. Sch. 13(1):48-63.

Osunsina IO, Ogunjinmi AA, Meduna AJ, Oyeleke OO (2008). Ecotourism potentials of Kamuku National Park, Birnin Gwari, Kaduna State. ASSET Int. J. ASSET Series A. 8(2):214-224.

Page JS, Dowling KR (2002). Ecotourism: themes in tourism. England: Prentice Hall, Harlow.

Pananjay GBG, Tawari K, Shashi GBG, Tawari K, Tawari SC (2011). An overview of potential ecotourism resources and their prospects in Valley of Flowers National Park. Uttaranchal, India. Caspian J. Environ. Sci. 9(1):105-110.

Poiani AK, Baumgartner VJ, Buttrick CS, Green LS, Hopkins E, Ivey DG, Seaton PK, Sutter D R (1998). A scale-independent, site conservation planning framework in the Nature Conservancy. Landscape Urban Plan. 43(1):143-156. 
Crossref

Ray N, Das KD, Chaudhuri S, Ghosh A (2015). Strategic infrastructure development for economic growth and social changes. USA: IGI Global publishing.
Crossref

Stankov U, Stojanovic V, Dragicevic V, Arsenović D (2011). Ecotourism – an alternative to mass tourism in nature park "staraplanina". J. Geogr. Institute "Jovan Cvijić". 61(1):43-59. doi: 10.2298/IJGI1101043S
Crossref

SNNPR Natural resource and Agricultural Office (2002). A survey report of Maze Wildlife Reserve, wildlife management team. Maze National Park.

Spratt C, Walker R, Robinson B (2004). Module A5: Mixed research methods. Common wealth of learning.

TIES (2015). What is ecotourism? Retrieved from http://www.ecotourism.org/what-is-ecotourism on July, 2015.

UNWTO (2008). Seminar on ecotourism and protected areas in Africa: Contributing to community development and conservation, Summary Report. Maputo, Mozambique.

Walpole JM, Williams LN (2002). Tourism and flagship species in conservation. J. Biodivers. Conserv. 11:543-547.
Crossref

Weaver D (1998). Ecotourism in less developed World. Wallingforg, UK: CAB International.

WTTC (2014). Gender equality and youth employment: Travel & Tourism as a key employer of women and young people. 

View

Young J (2012). Ethiopian Protected Areas: A 'Snapshot': A reference guide for future strategic planning and project funding.

Yucel C (2002). Value emerging tourism: ecotourism. Association of Turkish Travel Agencies, Ar-ge Deparment.