APA (7th ed.) Citation

Knowlton, F. H., & Geological Survey (U.S.). (1902). Fossil flora of the John Day basin, Oregon. Department of the Interior, United States Geological Survey.

Chicago Style (17th ed.) Citation

Knowlton, Frank Hall, and Geological Survey (U.S.). Fossil Flora of the John Day Basin, Oregon. Washington, D.C.: Department of the Interior, United States Geological Survey, 1902.

MLA (8th ed.) Citation

Knowlton, Frank Hall, and Geological Survey (U.S.). Fossil Flora of the John Day Basin, Oregon. Department of the Interior, United States Geological Survey, 1902.