Dyfyniad APA

Johnson, S. (2005). The one minute sales person. Harper collins.

Dyfyniad Arddull Chicago

Johnson, Spencer. The One Minute Sales Person. New Delhi: Harper collins, 2005.

Dyfyniad MLA

Johnson, Spencer. The One Minute Sales Person. Harper collins, 2005.

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