Cita APA (7th ed.)
Okorie, J. U. (1986). Agriculture science for teacher training colleges. Longman.
Cita Chicago (17th ed.)
Okorie, J U. Agriculture Science for Teacher Training Colleges. England: Longman, 1986.
Cita MLA (9th ed.)
Okorie, J U. Agriculture Science for Teacher Training Colleges. Longman, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.