Charan, R. (2007). What the Customer Wants You to Know. Portfolio/Penguin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCharan, Ram. What the Customer Wants You to Know. Gururgram: Portfolio/Penguin, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCharan, Ram. What the Customer Wants You to Know. Portfolio/Penguin, 2007.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.