Denov Chris. (2006). Satisfaction: How every great company listen to the vice of the customer. Penguin.
Lua i Stíl Chicago (17ú heag.)Denov Chris. Satisfaction: How Every Great Company Listen to the Vice of the Customer. New delhi: Penguin, 2006.
Lua MLA (9ú heag.)Denov Chris. Satisfaction: How Every Great Company Listen to the Vice of the Customer. Penguin, 2006.
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