APA ציטוט

Vaynerchuk, G. (2011). The thank you economy. New York: Harper Business.

Παραπομπή Chicago Style

Vaynerchuk, Gary. The Thank You Economy. New York: Harper Business, 2011.

ציטוט MLA

Vaynerchuk, Gary. The Thank You Economy. New York: Harper Business, 2011.