Dyfyniad APA

Schiggman, S. (2010). Selling When No One is Buying (5th.). Kogan Page.

Dyfyniad Arddull Chicago

Schiggman, Stephan. Selling When No One Is Buying. 5th. India: Kogan Page, 2010.

Dyfyniad MLA

Schiggman, Stephan. Selling When No One Is Buying. 5th. Kogan Page, 2010.

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