BATRA PRAMOD. (1996). SIMPLE WAYS TO MAKE YOUR CUSTOMERS HAPPY. THINK INCORPORTED.
Cita Chicago (17th ed.)BATRA PRAMOD. SIMPLE WAYS TO MAKE YOUR CUSTOMERS HAPPY. NEW DELHI: THINK INCORPORTED, 1996.
Cita MLA (9th ed.)BATRA PRAMOD. SIMPLE WAYS TO MAKE YOUR CUSTOMERS HAPPY. THINK INCORPORTED, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.