Παραπομπή APA

Alexander, R. D. (1981). Natural selection and social behavior: Recent research and new theory. Chiron pres.

Παραπομπή Chicago Style

Alexander, Richard D. Natural Selection and Social Behavior: Recent Research and New Theory. New York: Chiron pres, 1981.

Παραπομπή MLA

Alexander, Richard D. Natural Selection and Social Behavior: Recent Research and New Theory. Chiron pres, 1981.