Dyfyniad APA

Zeithaml, V. A. (1996). Services marketing. McGraw-Hill.

Dyfyniad Arddull Chicago

Zeithaml, Valarie A. Services Marketing. New York: McGraw-Hill, 1996.

Dyfyniad MLA

Zeithaml, Valarie A. Services Marketing. McGraw-Hill, 1996.

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