Lua APA (7ú heag.)

Zeithaml, V. A. (2003). Services marketing ed.3. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Zeithaml, Valarie A. Services Marketing Ed.3. McGraw-Hill, 2003.

Lua MLA (8ú heag.)

Zeithaml, Valarie A. Services Marketing Ed.3. McGraw-Hill, 2003.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.