Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.