Charan, R. (2008). What the Customer Wants You to Know. Penguin Group.
Citazione stile Chigago Style (17a edizione)Charan, Ram. What the Customer Wants You to Know. New Delhi: Penguin Group, 2008.
Citatione MLA (9a ed.)Charan, Ram. What the Customer Wants You to Know. Penguin Group, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.