Gaya APA

United, . (2013). U.S.P 37-NP 32 Vol. 4 (U.S. Pharmacopeia National Formulary . Baltimore: United Book Press.

Gaya MLA

United, . "U.S.P 37-NP 32 Vol. 4 (U.S. Pharmacopeia National Formulary". Baltimore: United Book Press, 2013. print.