Zeithaml, V. A., Bitner, M. J., & Gremler, D. D. (2013). Services marketing: Integrating customer focus across the firm (6th ed.). McGraw-Hill Irwin.
Lua i Stíl Chicago (17ú heag.)Zeithaml, Valarie A., Mary Jo Bitner, agus Dwayne D. Gremler. Services Marketing: Integrating Customer Focus Across the Firm. 6th ed. New York: McGraw-Hill Irwin, 2013.
Lua MLA (8ú heag.)Zeithaml, Valarie A., et al. Services Marketing: Integrating Customer Focus Across the Firm. 6th ed. McGraw-Hill Irwin, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.