Vaynerchuk, G. (2011). The thank you economy. New York: Harper Business.
Chicago Style CitationVaynerchuk, Gary. The Thank You Economy. New York: Harper Business, 2011.
Cita MLAVaynerchuk, Gary. The Thank You Economy. New York: Harper Business, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.