APA (7th ed.) Citation

Ahrens, L. H. (1971). Physics and chemistry of the earth. Pergamon Press.

Chicago Style (17th ed.) Citation

Ahrens, L. H. Physics and Chemistry of the Earth. Oxford: Pergamon Press, 1971.

MLA (9th ed.) Citation

Ahrens, L. H. Physics and Chemistry of the Earth. Pergamon Press, 1971.

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