APA (7th ed.) Zitazioa
Williams, W. (1964). Genetical principles and plant breeding. F.A. Davis.
Chicago Style (17th ed.) Zitazioa
Williams, Watkin. Genetical Principles and Plant Breeding. Philadelphia: F.A. Davis, 1964.
MLA (9th ed.) Zitazioa
Williams, Watkin. Genetical Principles and Plant Breeding. F.A. Davis, 1964.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.