Lua APA (7ú heag.)
ebrary, Inc. (2003). Service quality: An Emerald guide. Emerald Group Publishing.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc. Service Quality: An Emerald Guide. Bradford, England: Emerald Group Publishing, 2003.
Lua MLA (9ú heag.)
ebrary, Inc. Service Quality: An Emerald Guide. Emerald Group Publishing, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.