APA (7th ed.) Zitazioa

Okpako, D. (1991). Principles of pharmacology: A tropical approach. Univ. Pr..

Chicago Style (17th ed.) Zitazioa

Okpako, D.T. Principles of Pharmacology: A Tropical Approach. Cambridge: Univ. Pr., 1991.

MLA (9th ed.) Zitazioa

Okpako, D.T. Principles of Pharmacology: A Tropical Approach. Univ. Pr., 1991.