APA (7th ed.) Citation

Knowlton, F. H. (1900). Flora of the Montana formation. Department of the Interior, United States Geological Survey.

Chicago Style (17th ed.) Citation

Knowlton, Frank Hall. Flora of the Montana Formation. Washington, D.C.: Department of the Interior, United States Geological Survey, 1900.

MLA (9th ed.) Citation

Knowlton, Frank Hall. Flora of the Montana Formation. Department of the Interior, United States Geological Survey, 1900.