Aberra D (2009). Principles Guiding the Choice of Official working languages is Multilingual Societies: Some Reflections on the Language Policy of Ethiopia. In Tsegaye Regassa (ed.) Issues of Federalism in Ethiopia: Towards an Inventory, Ethiopian Constitutional Law Series, Addis Ababa: Addis Ababa University Press. p. 2

Abraham D (1990). Language, Identity and Peace in Ethiopia and the Horn. International Conference on the Horn of Africa 4th 1989. New York: Centre for the Study of the Horn of Africa.

Asafa J (2010). Urban Centers in Oromia: Consequences of Spatial Concentration of Power in Multinational Ethiopia, J. Oromo Stud.17(2):9-74.

Benti G (2001). An Overview of Some Factors Limiting the Migration ofthe Oromo to Addis Ababa. The Journal of Oromo Studies, 8:1-2.

Cohen PEG (2000). Identity and Opportunity: The Implications of Using Local Languages in the Primary Education System of the Southern Nations, Nationalities and Peoples Region (SNNPR), Ethiopia. Ph.D. dissertation. School of Oriental & Africa Studies: London University.

Fernand de V (2012). "International and Comparative Perspectives in the Use of Official Languages: models and approaches for South Africa", Draft Report. Afrikaanse Taalraad.

Erk J, Koning E (2010). New Structuralism and Institutional Change: Federalism Between Centralization and Decentralization, Comparative Political Studies, 43(3):53–378.
Crossref

Hood C (2000). Relationship Between Ministers/Politicians and Public Servants: Public Service Bargains Old and New, in B.G. Peters and D. Savoie (eds), Governance in the Twenty-first Century: Revitalizing the Public Service. Montreal-Kingston: McGill-Queen's University Press, pp.178–206.

Jenson J (1989). Paradigms and Political Discourse: Protective Legislation in France and the United States Before 1914, Canadian J. Political Sci. 22(2):235–258.
Crossref

Laitin DD (1977). Politics, Language, and Thought: The Somali Experience. Chicago and London: The University of Chicago Press.

Levine DD (2000). Greater Ethiopia: The Evolution of a Multi-ethnic Society. Chicago and London: The University of Chicago Press.

McGarry J, Brendan OL, Richard S (2008). Integration or accommodation? The enduring debate in conflict regulation. In Sujit Choudhry (ed.) Constitutional Design for Divided Societies: Integration or Accommodation. USA: Oxford University Press.

Merera G (2003). Ethiopia: Competing Ethnic Nationalisms and the Quest for Democracy, 1960-2000. Netherlands: Shaker Publishing.

Milkessa M (2011). "Ethiopia's Choice of Federal Working Language and Its Implications for non-Amharic Languages: The Case of Afan Oromo." M. A. thesis, AAU.

Patten A, Kymlicka W (2003). Introduction: Language Rights and Political Theory: Context, Issues, and Approaches. In Will Kymlicka and Alan Patten (eds) Language and Political Theory. New York: Oxford University Press.

Pool J (1991). The Official Language Problem. The American Political Science Review. 82(2):495-514. http://dx.doi.org/10.2307/1963171
Crossref

Turgeon L, Gagnon GA (2013). The Politics of Representative Bureaucracy in Multilingual States: A Comparison of Belgium, Canada and Switzerland, Reg. Federal Stud. 23:4.
Crossref

Van Parijis P (2003). Linguistic Justice. In Will Kymlicka and Alan Patten (eds) Language and Political Theory. New York: Oxford University Press.

Weinstein B (1983). The Civic Tongue: Political Consequences of Language Choices. New York and London: Longman Inc.

Yared L (2009). Linguistic Regimes in Multinational Federations: The Ethiopian Experience in Comparative Perspective. In Tsegaye Regassa (ed.) Issues of Federalism in Ethiopia: Towards an Inventory. Ethiopian Constitutional Law Series, Addis Ababa University Press. p. 2

Yonatan F (2009). A Tale of two Federations: Comparing Language Rights Regimes in South Africa and Ethiopia. In Tsegaye Regassa (ed.) Issues of Federalism in Ethiopia: Towards an Inventory. Ethiopian Constitutional Law Series, Addis Ababa University Press. p. 2