APA (7th ed.) Citation

Proprietary drugs. O.J. Willoughby [etc.].

Chicago Style (17th ed.) Citation

Proprietary Drugs. Atlanta, Ga.: O.J. Willoughby [etc.].

MLA (8th ed.) Citation

Proprietary Drugs. O.J. Willoughby [etc.].

Warning: These citations may not always be 100% accurate.