Cita APA (7th ed.)

Grigg, D. (1992). An Introduction to agricultural geography. Routledge.

Cita Chicago (17th ed.)

Grigg, David. An Introduction to Agricultural Geography. London: Routledge, 1992.

Cita MLA (9th ed.)

Grigg, David. An Introduction to Agricultural Geography. Routledge, 1992.