APA (7th ed.) Citation

Breen, G. E., Thompson, R. B., & West, H. (1950). Effective selling. Harper.

Chicago Style (17th ed.) Citation

Breen, George Edward, Ralph Burnham Thompson, and Henry West. Effective Selling. New York: Harper, 1950.

MLA (9th ed.) Citation

Breen, George Edward, et al. Effective Selling. Harper, 1950.