APA
auth. & The United States Pharmacopeia/The National Formulary, . (1999). The United States Pharmacopeia 24/The National Formulary 19. auth., Rockville: .
Chicago
auth. & The United States Pharmacopeia/The National Formulary, . 1999. The United States Pharmacopeia 24/The National Formulary 19. auth., Rockville: .
Harvard
auth. & The United States Pharmacopeia/The National Formulary, . (1999). The United States Pharmacopeia 24/The National Formulary 19. auth., Rockville: .
MLA
auth. & The United States Pharmacopeia/The National Formulary, . The United States Pharmacopeia 24/The National Formulary 19. auth., Rockville: . 1999.