APA (7th ed.) Citation

(1940). Systematic plant studies, mainly tropical American. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Systematic Plant Studies, Mainly Tropical American. [Place of publication not identified]: U.S. Government Printing Office, 1940.

MLA (9th ed.) Citation

Systematic Plant Studies, Mainly Tropical American. U.S. Government Printing Office, 1940.

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