Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.