Citazione APA

Kummel, B. (1961). History of the earth: An introduction to historical geology. San Francisco ; London: W. H. Freeman and Co..

Stile di citazione Chicago

Kummel, Bernhard. History of the Earth: An Introduction to Historical Geology. San Francisco ; London: W. H. Freeman and Co., 1961.

Citazione MLA

Kummel, Bernhard. History of the Earth: An Introduction to Historical Geology. San Francisco ; London: W. H. Freeman and Co., 1961.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.