APA (7th ed.) Citation

Stebbins, G. L., Jr. (1967). Variation and Evolution in Plants (6th ptg.). Columbia University Press.

Chicago Style (17th ed.) Citation

Stebbins, G. Ledyard, Jr. Variation and Evolution in Plants. 6th ptg. New York: Columbia University Press, 1967.

MLA (9th ed.) Citation

Stebbins, G. Ledyard, Jr. Variation and Evolution in Plants. 6th ptg. Columbia University Press, 1967.