APA (7th ed.) Citation

Merrill, G. P. (1964). The first one hundred years of American geology. Hafner Pub. Co.

Chicago Style (17th ed.) Citation

Merrill, George P. The First One Hundred Years of American Geology. New York: Hafner Pub. Co, 1964.

MLA (9th ed.) Citation

Merrill, George P. The First One Hundred Years of American Geology. Hafner Pub. Co, 1964.