Hill, N. (2003). hand book for measusing customer Satisfaction and loyalty. Infinity Books.
Lua i Stíl Chicago (17ú heag.)Hill, Nigel. Hand Book for Measusing Customer Satisfaction and Loyalty. Delhi: Infinity Books, 2003.
Lua MLA (9ú heag.)Hill, Nigel. Hand Book for Measusing Customer Satisfaction and Loyalty. Infinity Books, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.