Charan, R. (2007). What the Customer Wants You to Know. Portfolio/Penguin.
Chicago-viite (17. p.)Charan, Ram. What the Customer Wants You to Know. Gururgram: Portfolio/Penguin, 2007.
MLA-viite (9. p.)Charan, Ram. What the Customer Wants You to Know. Portfolio/Penguin, 2007.
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