APA aipamena

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

Chicago Style aipamena

Kummel, Bernhard. History of the Earth: An Introduction to Historical Geology. New Delhi: Eurasia, 1961.

MLA aipamena

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