Dyfyniad APA

Wheeler, E. (1961). Tested selling tips from around the world. Prentice Hall.

Dyfyniad Arddull Chicago

Wheeler, Elmer. Tested Selling Tips from Around the World. New Jersey: Prentice Hall, 1961.

Dyfyniad MLA

Wheeler, Elmer. Tested Selling Tips from Around the World. Prentice Hall, 1961.

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