Dyfyniad APA

Clayton, G. E. (2007). Economics: Principles and practices. New York: Glencoe/McGraw-Hill.

Dyfyniad Arddull Chicago

Clayton, Gary E. Economics: Principles and Practices. New York: Glencoe/McGraw-Hill, 2007.

Dyfyniad MLA

Clayton, Gary E. Economics: Principles and Practices. New York: Glencoe/McGraw-Hill, 2007.

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