Dyfyniad APA

Zeithaml, V. A. B. (2013). Services Marketing (7th ed.). Pearson Education.

Dyfyniad Arddull Chicago

Zeithaml, Valarie A; Bitner. Services Marketing. 7th ed. New Delhi: Pearson Education, 2013.

Dyfyniad MLA

Zeithaml, Valarie A; Bitner. Services Marketing. 7th ed. Pearson Education, 2013.

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