Cita APA

Grigg, D. B. 1. (1978). The agricultural systems of the world: An evolutionary approach. Cambridge: Cambridge University Press.

Citación estilo Chicago

Grigg, David B. 1934-. The Agricultural Systems of the World: An Evolutionary Approach. Cambridge: Cambridge University Press, 1978.

Cita MLA

Grigg, David B. 1934-. The Agricultural Systems of the World: An Evolutionary Approach. Cambridge: Cambridge University Press, 1978.