APA (7th ed.) Citation

Cohen, M. R., Nagel, E., & Corcoran, J. (1993). An introduction to logic (2nd ed.). Hackett.

Chicago Style (17th ed.) Citation

Cohen, Morris Raphael, Ernest Nagel, and John Corcoran. An Introduction to Logic. 2nd ed. Indianapolis [etc.]: Hackett, 1993.

MLA (9th ed.) Citation

Cohen, Morris Raphael, et al. An Introduction to Logic. 2nd ed. Hackett, 1993.