APA aipamena
Etkin, W. (1964). Social behavior and organization among vertebrates. University of Chicago Press.
Chicago Style aipamena
Etkin, William. Social Behavior and Organization Among Vertebrates. Chicago: University of Chicago Press, 1964.
MLA aipamena
Etkin, William. Social Behavior and Organization Among Vertebrates. University of Chicago Press, 1964.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.