APA ציטוט

Roy, E. P. (1981). Economics: Applications to agriculture and agribusiness (3rd ed.). Danville, Ill: Interstate Printers & Publishers.

Trích dẫn kiểu Chicago

Roy, Ewell P. Economics: Applications to Agriculture and Agribusiness. 3rd ed. Danville, Ill: Interstate Printers & Publishers, 1981.

ציטוט MLA

Roy, Ewell P. Economics: Applications to Agriculture and Agribusiness. 3rd ed. Danville, Ill: Interstate Printers & Publishers, 1981.