APA (7th ed.) Zitazioa

Buckingham, F. (1976). Tillage. Deere.

Chicago Style (17th ed.) Zitazioa

Buckingham, Frank. Tillage. Moline, Illinois, USA: Deere, 1976.

MLA (9th ed.) Zitazioa

Buckingham, Frank. Tillage. Deere, 1976.