APA (7th ed.) Zitazioa
Okigbo, C. (1995). Media and sustainable development. Kenya Litho.
Chicago Style (17th ed.) Zitazioa
Okigbo, Charles. Media and Sustainable Development. Nairobi: Kenya Litho, 1995.
MLA (9th ed.) Zitazioa
Okigbo, Charles. Media and Sustainable Development. Kenya Litho, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.