APA (7th ed.) Citation

Kummel, B. History of the earth an introduction to historical geology. Freemn and Co..

Chicago Style (17th ed.) Citation

Kummel, Bernhard. History of the Earth an Introduction to Historical Geology. Freemn and Co..

MLA (8th ed.) Citation

Kummel, Bernhard. History of the Earth an Introduction to Historical Geology. Freemn and Co..

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