APA (7th ed.) Citation

Simpson, R. L. (1988). Essentials of symbolic logic. Routledge.

Chicago Style (17th ed.) Citation

Simpson, Robert L. Essentials of Symbolic Logic. london New York: Routledge, 1988.

MLA (8th ed.) Citation

Simpson, Robert L. Essentials of Symbolic Logic. Routledge, 1988.