Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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