APA (7th ed.) Citation

Langer, S. K. (1953). An introduction to symbolic logic (2d ed. (rev.).). Dover Publications.

Chicago Style (17th ed.) Citation

Langer, Susanne K. An Introduction to Symbolic Logic. 2d ed. (rev.). New York: Dover Publications, 1953.

MLA (9th ed.) Citation

Langer, Susanne K. An Introduction to Symbolic Logic. 2d ed. (rev.). Dover Publications, 1953.