Cita APA (7a ed.)

PEPPERS DON. (2005). RETURN ON CUSTOMER. DOUBLEDAY.

Cita Chicago Style (17a ed.)

PEPPERS DON. RETURN ON CUSTOMER. NEW YORK: DOUBLEDAY, 2005.

Cita MLA (9a ed.)

PEPPERS DON. RETURN ON CUSTOMER. DOUBLEDAY, 2005.