Dyfyniad APA

Kerin, R. A., Hartley, S. W., & Rudelius, W. (2009). Marketing (9th ed.). McGraw-Hill/IRWIN.

Dyfyniad Arddull Chicago

Kerin, Roger A., Steven William Hartley, and William Rudelius. Marketing. 9th ed. Boston: McGraw-Hill/IRWIN, 2009.

Dyfyniad MLA

Kerin, Roger A., et al. Marketing. 9th ed. McGraw-Hill/IRWIN, 2009.

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