Joseph A Michelli. (2012). Zappos Experience. Mcgrawhill.
Chicago-čujuhus (17. p.)Joseph A Michelli. Zappos Experience. Mcgrawhill, 2012.
MLA-čujuhus (9. p.)Joseph A Michelli. Zappos Experience. Mcgrawhill, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.