Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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