APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Cohen, Morris R., and Ernest Nagel. An Introduction to Logic. 2. ed. Indianapolis [u.a.]: Hackett, 1993.

MLA (9th ed.) Citation

Cohen, Morris R., and Ernest Nagel. An Introduction to Logic. 2. ed. Hackett, 1993.