APA (7th ed.) Zitazioa
Okorie, J. U. (1986). Agriculture science for teacher training colleges. Longman.
Chicago Style (17th ed.) Zitazioa
Okorie, J U. Agriculture Science for Teacher Training Colleges. England: Longman, 1986.
MLA (9th ed.) Zitazioa
Okorie, J U. Agriculture Science for Teacher Training Colleges. Longman, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.