Gaya APA

Southgate, D, D. et al (1997). Agricultural economics and agribusiness / Gail L. Cramer, Clarence W. Jensen, Douglas D. Southgate, Jr. . New York: John Wiley n Sons.

Gaya MLA

Southgate, Douglas, D.. et al. "Agricultural economics and agribusiness / Gail L. Cramer, Clarence W. Jensen, Douglas D. Southgate, Jr.". New York: John Wiley n Sons, 1997. Textbook.