Charan, R. (2008). What the Customer Wants You to Know. Penguin Group.
芝加哥风格引文Charan, Ram. What the Customer Wants You to Know. New Delhi: Penguin Group, 2008.
MLA引文Charan, Ram. What the Customer Wants You to Know. Penguin Group, 2008.
警告：这些引文格式不一定是100％准确.