Bruce L. Gardner and Gordon C. Rausser. (2001). Agricultural Production. ELSEVIER.
Chicago Style aipamenaBruce L. Gardner and Gordon C. Rausser. Agricultural Production. ELSEVIER, 2001.
MLA aipamenaBruce L. Gardner and Gordon C. Rausser. Agricultural Production. ELSEVIER, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.