APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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