Dyfyniad APA

Seitz, W. D., Nelson, G. C., & Halcrow, H. G. (1994). Economics of resources, agriculture, and food. New York ; Singapore: McGraw-Hill.

Dyfyniad Arddull Chicago

Seitz, Wesley D., Gerald C. Nelson, và Harold G. Halcrow. Economics of Resources, Agriculture, and Food. New York ; Singapore: McGraw-Hill, 1994.

Dyfyniad MLA

Seitz, Wesley D., Gerald C. Nelson, và Harold G. Halcrow. Economics of Resources, Agriculture, and Food. New York ; Singapore: McGraw-Hill, 1994.

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