APA (7th ed.) Citation

Hitchcock, A. S., & Chase, A. (1920). Revisions of North American grasses. Government Printing Office.

Chicago Style (17th ed.) Citation

Hitchcock, A. S., and Agnes Chase. Revisions of North American Grasses. Washington: Government Printing Office, 1920.

MLA (9th ed.) Citation

Hitchcock, A. S., and Agnes Chase. Revisions of North American Grasses. Government Printing Office, 1920.