Cita APA (7a ed.)

Grigg, D. B. (1976). The agricultural systems of the world: An evolutionary approach. Cambridge University Press.

Cita Chicago Style (17a ed.)

Grigg, David B. The Agricultural Systems of the World: An Evolutionary Approach. London [etc.]: Cambridge University Press, 1976.

Cita MLA (9a ed.)

Grigg, David B. The Agricultural Systems of the World: An Evolutionary Approach. Cambridge University Press, 1976.