APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Lewis, Clarence Irving, and Cooper H. Langford. Symbolic Logic. 2. ed. New York, NY: Dover Publ, 1959.

MLA (9th ed.) Citation

Lewis, Clarence Irving, and Cooper H. Langford. Symbolic Logic. 2. ed. Dover Publ, 1959.