APA (7th ed.) Citation

Grabau, A. W. (1920). A textbook of geology. D. C. Heath & co..

Chicago Style (17th ed.) Citation

Grabau, Amadeus W. A Textbook of Geology. Boston, New York, [etc.]: D. C. Heath & co., 1920.

MLA (9th ed.) Citation

Grabau, Amadeus W. A Textbook of Geology. D. C. Heath & co., 1920.