APA (7th ed.) Citation

Gunn, C. R. (1979). Genus vicia with notes about tribe Vicieae (Fabaceae) in Mexico and Central America. U.S. Gov. Print. Off.

Chicago Style (17th ed.) Citation

Gunn, Charles R. Genus Vicia with Notes About Tribe Vicieae (Fabaceae) in Mexico and Central America. Washington, DC: U.S. Gov. Print. Off, 1979.

MLA (9th ed.) Citation

Gunn, Charles R. Genus Vicia with Notes About Tribe Vicieae (Fabaceae) in Mexico and Central America. U.S. Gov. Print. Off, 1979.