APA (7th ed.) Citation

Croneis, C., & Krumbein, W. C. (1961). Down to earth: An introduction to geology. University of Chicago Press.

Chicago Style (17th ed.) Citation

Croneis, Carey, and William Christian Krumbein. Down to Earth: An Introduction to Geology. Chicago: University of Chicago Press, 1961.

MLA (9th ed.) Citation

Croneis, Carey, and William Christian Krumbein. Down to Earth: An Introduction to Geology. University of Chicago Press, 1961.

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