APA (7th ed.) Citation

Merrill, G. P. (1924). The first hundred years of American geology. Yale University Press.

Chicago Style (17th ed.) Citation

Merrill, George P. The First Hundred Years of American Geology. New Haven: Yale University Press, 1924.

MLA (9th ed.) Citation

Merrill, George P. The First Hundred Years of American Geology. Yale University Press, 1924.