Dyfyniad APA

Wollan, R. &. O. (2013). Selling through someone else. John Wiley.

Dyfyniad Arddull Chicago

Wollan, Robert & Others. Selling Through Someone Else. New Jersey: John Wiley, 2013.

Dyfyniad MLA

Wollan, Robert & Others. Selling Through Someone Else. John Wiley, 2013.

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