APA stil citiranja

Okpewho, I. (1976). The last duty: The last duty. Harlow: Longman.

Chicago stil citiranja

Okpewho, Isidore. The last duty: The last duty. Harlow: Longman, 1976.

MLA stil citiranja

Okpewho, Isidore. The last duty: The last duty. Harlow: Longman, 1976.

Napomena: Ova citiranost nije uvijek 100% točna.