Cita APA

The United States Pharmacopeial Convention. (2001). The United States Pharmacopeia: The National Formulary, USP:25 y NF:20 (Twentieth Edition.). (s.i.): The United States Pharmaopeial Convention.

Citación estilo Chicago

The United States Pharmacopeial Convention. The United States Pharmacopeia: The National Formulary, USP:25 Y NF:20. Twentieth Edition. (s.i.): The United States Pharmaopeial Convention, 2001.

Cita MLA

The United States Pharmacopeial Convention. The United States Pharmacopeia: The National Formulary, USP:25 Y NF:20. Twentieth Edition. (s.i.): The United States Pharmaopeial Convention, 2001.