APA (7th ed.) Citation

Langer, S. K. (1953). Introduction to symbolic logic / by S.K. Langer (2nd ed.). Dover.

Chicago Style (17th ed.) Citation

Langer, S. K. Introduction to Symbolic Logic / by S.K. Langer. 2nd ed. Dover, 1953.

MLA (9th ed.) Citation

Langer, S. K. Introduction to Symbolic Logic / by S.K. Langer. 2nd ed. Dover, 1953.

Warning: These citations may not always be 100% accurate.