APA (7th ed.) Citation

Wheeler, E. (1942). Tested direct selling. Prentice-Hall.

Chicago Style (17th ed.) Citation

Wheeler, Elmer. Tested Direct Selling. New York: Prentice-Hall, 1942.

MLA (9th ed.) Citation

Wheeler, Elmer. Tested Direct Selling. Prentice-Hall, 1942.

Warning: These citations may not always be 100% accurate.