APA (7th ed.) Zitazioa

(1985). Agricultural chartbook / United States Department of Agriculture.

Chicago Style (17th ed.) Zitazioa

Agricultural Chartbook / United States Department of Agriculture. 1985.

MLA (9th ed.) Zitazioa

Agricultural Chartbook / United States Department of Agriculture. 1985.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.