APA (7th ed.) Citation

Cohen, M. R., & Nagel, E. (1934). An introduction to logic and scientific method. Harcourt, Brace & World.

Chicago Style (17th ed.) Citation

Cohen, Morris Raphael, and Ernest Nagel. An Introduction to Logic and Scientific Method. New York [etc.]: Harcourt, Brace & World, 1934.

MLA (9th ed.) Citation

Cohen, Morris Raphael, and Ernest Nagel. An Introduction to Logic and Scientific Method. Harcourt, Brace & World, 1934.