APA (7th ed.) Citation

Knowlton, F. H. (1923). Fossil plants from the Tertiary lake beds of south-central Colorado. Gov. Print. Off.

Chicago Style (17th ed.) Citation

Knowlton, Frank Hall. Fossil Plants from the Tertiary Lake Beds of South-central Colorado. Washington, DC: Gov. Print. Off, 1923.

MLA (9th ed.) Citation

Knowlton, Frank Hall. Fossil Plants from the Tertiary Lake Beds of South-central Colorado. Gov. Print. Off, 1923.