Gaya APA

Convention, T, U, S, P. (1980). The United States pharmacopeia XX, the national formulary XV (Ed. 20). Parkway: The United States Pharmacopeia Conve.

Gaya MLA

Convention, The, United, States, Pharmacopeial. "The United States pharmacopeia XX, the national formulary XV". Ed. 20 Parkway: The United States Pharmacopeia Conve, 1980. FAKULTAS FARMASI.