Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Precaución: Estas citas no son 100% exactas.