APA (7th ed.) Citation

Lewis, C. I., & Langford, C. H. (1932). Symbolic logic. Century.

Chicago Style (17th ed.) Citation

Lewis, Clarence Irving, and Cooper Harold Langford. Symbolic Logic. New York: Century, 1932.

MLA (9th ed.) Citation

Lewis, Clarence Irving, and Cooper Harold Langford. Symbolic Logic. Century, 1932.