Shankar,Ravi. (2002). Services Marketing. Excel Books.
Lua i Stíl Chicago (17ú heag.)Shankar,Ravi. Services Marketing. New Delhi: Excel Books, 2002.
Lua MLA (9ú heag.)Shankar,Ravi. Services Marketing. Excel Books, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.