APA (7th ed.) Citation

Evans, D. L., Gamertsfelder, W. S., & Nelson, A. F. (1957). Elements of logic. Brown.

Chicago Style (17th ed.) Citation

Evans, Daniel Luther, Walter Sylvester Gamertsfelder, and Alvin F. Nelson. Elements of Logic. Dubuque, Iowa: Brown, 1957.

MLA (9th ed.) Citation

Evans, Daniel Luther, et al. Elements of Logic. Brown, 1957.