APA (7th ed.) Zitazioa
Osha, S. (2014). The social contract in Africa. Africa Institute of South Africa.
Chicago Style (17th ed.) Zitazioa
Osha, Sanya. The Social Contract in Africa. Pretoria, South Africa: Africa Institute of South Africa, 2014.
MLA (9th ed.) Zitazioa
Osha, Sanya. The Social Contract in Africa. Africa Institute of South Africa, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.