APA引文

Cramer, G. L. (1997). Agricultural economics and agribusiness. New York: John Wiley and Sons.

Trích dẫn kiểu Chicago

Cramer, Gail L. Agricultural Economics and Agribusiness. New York: John Wiley and Sons, 1997.

MLA引文

Cramer, Gail L. Agricultural Economics and Agribusiness. New York: John Wiley and Sons, 1997.

警告：这些引文格式不一定是100％准确.