APA (7th ed.) Citation

Grigg, D. B. (1974). The agricultural systems of the world: An evolutionary approach. Cambridge University Press.

Chicago Style (17th ed.) Citation

Grigg, David B. The Agricultural Systems of the World: An Evolutionary Approach. London: Cambridge University Press, 1974.

MLA (9th ed.) Citation

Grigg, David B. The Agricultural Systems of the World: An Evolutionary Approach. Cambridge University Press, 1974.