APA (7th ed.) Citation

Standley, P. C., & Steyermark, J. A. (1946). Flora of Guatemala. Natural History Museum.

Chicago Style (17th ed.) Citation

Standley, Paul Carpenter, and Julian A. Steyermark. Flora of Guatemala. Chicago: Natural History Museum, 1946.

MLA (8th ed.) Citation

Standley, Paul Carpenter, and Julian A. Steyermark. Flora of Guatemala. Natural History Museum, 1946.