APA (7th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. (1941). Horse bots and their control. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Horse Bots and Their Control. [Washington]: [s.n.], 1941.

MLA (9th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Horse Bots and Their Control. [s.n.], 1941.