APA引文

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

Trích dẫn kiểu Chicago

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

MLA引文

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

警告：這些引文格式不一定是100％准確.