Dyfyniad APA

 Perreault, W. D. (2010).  Essentials of marketing: A marketing strategy planning approach.  McGraw-Hill/Irwin.

Dyfyniad Arddull Chicago

 Perreault, William D.  Essentials of Marketing: A Marketing Strategy Planning Approach.  McGraw-Hill/Irwin, 2010.

Dyfyniad MLA

 Perreault, William D.  Essentials of Marketing: A Marketing Strategy Planning Approach.  McGraw-Hill/Irwin, 2010.

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