APA (7th ed.) Citation

Hitchcock, A. S. (1922). Grasses of British Guiana. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Hitchcock, A. S. Grasses of British Guiana. [Place of publication not identified]: U.S. Government Printing Office, 1922.

MLA (9th ed.) Citation

Hitchcock, A. S. Grasses of British Guiana. U.S. Government Printing Office, 1922.