Dyfyniad APA

Zeithaml Valarie A. (2018). Services Marketing (7.). McGraw Hill Education.

Dyfyniad Arddull Chicago

Zeithaml Valarie A. Services Marketing. 7. Chennai: McGraw Hill Education, 2018.

Dyfyniad MLA

Zeithaml Valarie A. Services Marketing. 7. McGraw Hill Education, 2018.

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