APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.