APA (7th ed.) Citation

Gleason, H. A., & Cronquist, A. (1964). The natural geography of plants. Columbia University Press.

Chicago Style (17th ed.) Citation

Gleason, Henry Allan, and Arthur Cronquist. The Natural Geography of Plants. New York: Columbia University Press, 1964.

MLA (9th ed.) Citation

Gleason, Henry Allan, and Arthur Cronquist. The Natural Geography of Plants. Columbia University Press, 1964.