Charan, R. (2007). What the Customer Wants You to Know. Penguin Books India.
Citazione stile Chigago Style (17a edizione)Charan, Ram. What the Customer Wants You to Know. Noida,UP: Penguin Books India, 2007.
Citatione MLA (9a ed.)Charan, Ram. What the Customer Wants You to Know. Penguin Books India, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.