Dyfyniad APA

Seitz, W. D. (2002). Economics of resources, agriculture, and food. Dubuque, Iowa: McGraw-Hill.

Dyfyniad Arddull Chicago

Seitz, Wesley D. Economics of Resources, Agriculture, and Food. Dubuque, Iowa: McGraw-Hill, 2002.

Dyfyniad MLA

Seitz, Wesley D. Economics of Resources, Agriculture, and Food. Dubuque, Iowa: McGraw-Hill, 2002.

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