APA (7th ed.) Zitazioa

Grigg, D. (1994). An introduction to agricultural geography. Routledge.

Chicago Style (17th ed.) Zitazioa

Grigg, David. An Introduction to Agricultural Geography. London: Routledge, 1994.

MLA (9th ed.) Zitazioa

Grigg, David. An Introduction to Agricultural Geography. Routledge, 1994.