Cita APA (7a ed.)

Stebbins, G. L. (1971). Procesess of organic evolution (2d. ed.). s.e..

Cita Chicago Style (17a ed.)

Stebbins, George Ledyard. Procesess of Organic Evolution. 2d. ed. New Jersey: s.e., 1971.

Cita MLA (9a ed.)

Stebbins, George Ledyard. Procesess of Organic Evolution. 2d. ed. s.e., 1971.