APA (7th ed.) Zitazioa

Lampkin, N. (1990). Organic farming (1a. ed.). Farming Press.

Chicago Style (17th ed.) Zitazioa

Lampkin, Nicolas. Organic Farming. 1a. ed. Ipswich: Farming Press, 1990.

MLA (9th ed.) Zitazioa

Lampkin, Nicolas. Organic Farming. 1a. ed. Farming Press, 1990.