Cox, I. W. (19). The Folly of Human Sterilization. New York.
Chicago Style aipamenaCox, Ignatius W. The Folly of Human Sterilization. New York, 19.
MLA aipamenaCox, Ignatius W. The Folly of Human Sterilization. New York, 19.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.