Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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