APA
National Formulary Board, . (1970). The national formulary xiii. Washington: American Pharmaceutical Association.
Chicago
National Formulary Board, . 1970. The national formulary xiii. Washington: American Pharmaceutical Association.
Harvard
National Formulary Board, . (1970). The national formulary xiii. Washington: American Pharmaceutical Association.
MLA
National Formulary Board, . The national formulary xiii. Washington: American Pharmaceutical Association. 1970.