Villee, C. A. (1957). Biology (3rd ed.). W.B. Saunders.
Chicago Style aipamenaVillee, Claude A. Biology. 3rd ed. Philadelphia: W.B. Saunders, 1957.
MLA aipamenaVillee, Claude A. Biology. 3rd ed. W.B. Saunders, 1957.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.