APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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