Gaya APA

Convention, U, S, P. (2005). US. Pharmacopeia 28 National Formulary 23 (Edisi 28 Jilid 1,2,3). Washington: United States Pharmacopeial Convention.

Gaya MLA

Convention, United, States, Pharmacopeial. "US. Pharmacopeia 28 National Formulary 23". Edisi 28 Jilid 1,2,3 Washington: United States Pharmacopeial Convention, 2005. Text.