Yang, K. (2008). Voice of the customer: Capture and analysis. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Yang, Kai. Voice of the Customer: Capture and Analysis. New York: McGraw-Hill, 2008.
Lua MLA (9ú heag.)Yang, Kai. Voice of the Customer: Capture and Analysis. McGraw-Hill, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.