Joseph A Michelli. (2012). Zappos Experience. Mcgrawhill.
Cita Chicago (17th ed.)Joseph A Michelli. Zappos Experience. Mcgrawhill, 2012.
Cita MLA (9th ed.)Joseph A Michelli. Zappos Experience. Mcgrawhill, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.