APA (7th ed.) Citation

Kummel, B. (1961). History of the earth: An introduction to historical geology. WH Freeman.

Chicago Style (17th ed.) Citation

Kummel, Bernhard. History of the Earth: An Introduction to Historical Geology. WH Freeman, 1961.

MLA (8th ed.) Citation

Kummel, Bernhard. History of the Earth: An Introduction to Historical Geology. WH Freeman, 1961.

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