APA (7th ed.) Citation

Hempel, C. G. (1956). Fundamentals of concept formation in empirical science. University of Chicago Press.

Chicago Style (17th ed.) Citation

Hempel, Carl G. Fundamentals of Concept Formation in Empirical Science. Chicago: University of Chicago Press, 1956.

MLA (9th ed.) Citation

Hempel, Carl G. Fundamentals of Concept Formation in Empirical Science. University of Chicago Press, 1956.