APA (7th ed.) Citation

Langer, S. K. (1967). An introduction to symbolic logic (3. rev. ed.). Dover Publ.

Chicago Style (17th ed.) Citation

Langer, Susanne K. An Introduction to Symbolic Logic. 3. rev. ed. New York: Dover Publ, 1967.

MLA (9th ed.) Citation

Langer, Susanne K. An Introduction to Symbolic Logic. 3. rev. ed. Dover Publ, 1967.