Gaya APA

Convention, U, S, P. (1995). US. Pharmacopeia 23 National Formulary 18 (Jilid 1,2). Washington: United States Pharmacopeial Convention.

Gaya MLA

Convention, United, States, Pharmacopeial. "US. Pharmacopeia 23 National Formulary 18". Jilid 1,2 Washington: United States Pharmacopeial Convention, 1995. Text.