APA (7th ed.) Citation

Croneis, C., & Krumbein, W. C. (1936). Down to earth: An introduction to geology. The University of Chicago Press.

Chicago Style (17th ed.) Citation

Croneis, Carey, and William Christian Krumbein. Down to Earth: An Introduction to Geology. Chicago, Ill: The University of Chicago Press, 1936.

MLA (9th ed.) Citation

Croneis, Carey, and William Christian Krumbein. Down to Earth: An Introduction to Geology. The University of Chicago Press, 1936.