Cooke, G. W. (1986). Fertilizing for maximum yield. ELBS.
Chicago Style aipamenaCooke, G. W. Fertilizing for Maximum Yield. London: ELBS, 1986.
MLA aipamenaCooke, G. W. Fertilizing for Maximum Yield. ELBS, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.