APA (7th ed.) Citation

Newman, W. L. (1988). Geologic time. U.S. Geological Survey, Dept. of the Interior.

Chicago Style (17th ed.) Citation

Newman, William L. Geologic Time. [Reston, Va.]: U.S. Geological Survey, Dept. of the Interior, 1988.

MLA (9th ed.) Citation

Newman, William L. Geologic Time. U.S. Geological Survey, Dept. of the Interior, 1988.