APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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