Charan, R. (2007). What the Customer Wants You to Know. Portfolio/Penguin.
Lua i Stíl Chicago (17ú heag.)Charan, Ram. What the Customer Wants You to Know. Gururgram: Portfolio/Penguin, 2007.
Lua MLA (9ú heag.)Charan, Ram. What the Customer Wants You to Know. Portfolio/Penguin, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.