APA (7th ed.) Citation

Clark, W. B. (1891). Correlation papers: Eocene. Department of the Interior, United States Geological Survey.

Chicago Style (17th ed.) Citation

Clark, William Bullock. Correlation Papers: Eocene. Washington, D.C.: Department of the Interior, United States Geological Survey, 1891.

MLA (9th ed.) Citation

Clark, William Bullock. Correlation Papers: Eocene. Department of the Interior, United States Geological Survey, 1891.