APA (7th ed.) Citation

Lewis, C. I., & Langford, C. H. (1959). Symbolic logic (2d ed.). Dover Publications.

Chicago Style (17th ed.) Citation

Lewis, Clarence Irving, and Cooper Harold Langford. Symbolic Logic. 2d ed. [New York]: Dover Publications, 1959.

MLA (8th ed.) Citation

Lewis, Clarence Irving, and Cooper Harold Langford. Symbolic Logic. 2d ed. Dover Publications, 1959.