Yang, K., & Kai Yang. Voice of the customer: Capture and analysis. New York: McGraw-Hill.
Čikaški stil citiranjaYang, Kai, i Kai Yang. Voice of the Customer: Capture and Analysis. New York: McGraw-Hill.
MLA način citiranjaYang, Kai, i Kai Yang. Voice of the Customer: Capture and Analysis. New York: McGraw-Hill.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.