APA (7th ed.) Citation

Arnold, C. A. (1937). Observations on the fossil flora of eastern and southeastern Oregon. University of Michigan Press.

Chicago Style (17th ed.) Citation

Arnold, Chester A. Observations on the Fossil Flora of Eastern and Southeastern Oregon. Ann Arbor: University of Michigan Press, 1937.

MLA (9th ed.) Citation

Arnold, Chester A. Observations on the Fossil Flora of Eastern and Southeastern Oregon. University of Michigan Press, 1937.