APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Simpson, R. L. Essentials of Symbolic Logic. London [etc.]: Routledge, 1988.

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.