(2014). Customer service management. 3G eLearning FZ LLC.
Lua i Stíl Chicago (17ú heag.)Customer Service Management. United Arab Emirates: 3G eLearning FZ LLC, 2014.
Lua MLA (9ú heag.)Customer Service Management. 3G eLearning FZ LLC, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.