APA (7th ed.) Citation

Rydberg, P. A., & Howe, M. A. (1932). Flora of the prairies and plains of central North America. The New York Botanical Garden.

Chicago Style (17th ed.) Citation

Rydberg, Per Axel, and Marshall Avery Howe. Flora of the Prairies and Plains of Central North America. New York: The New York Botanical Garden, 1932.

MLA (9th ed.) Citation

Rydberg, Per Axel, and Marshall Avery Howe. Flora of the Prairies and Plains of Central North America. The New York Botanical Garden, 1932.