APA (7th ed.) Citation

Oko, A. (1988). The secret of the sheik (1. publ.). Heinemann Educational Books.

Chicago Style (17th ed.) Citation

Oko, Atabo. The Secret of the Sheik. 1. publ. Ibadan: Heinemann Educational Books, 1988.

MLA (9th ed.) Citation

Oko, Atabo. The Secret of the Sheik. 1. publ. Heinemann Educational Books, 1988.

Warning: These citations may not always be 100% accurate.