Zeithaml, V. A., & Bitner, M. J. (2003). Services marketing: Integrating customer focus across the firm (3rd ed.). McGraw-Hill/Irwin.
Lua i Stíl Chicago (17ú heag.)Zeithaml, Valarie A., agus Mary Jo Bitner. Services Marketing: Integrating Customer Focus Across the Firm. 3rd ed. Boston: McGraw-Hill/Irwin, 2003.
Lua MLA (8ú heag.)Zeithaml, Valarie A., agus Mary Jo Bitner. Services Marketing: Integrating Customer Focus Across the Firm. 3rd ed. McGraw-Hill/Irwin, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.