APA (7th ed.) Citation

Arnold, C. A. (1947). An introduction to paleobotany. [publisher not identified].

Chicago Style (17th ed.) Citation

Arnold, Chester A. An Introduction to Paleobotany. New York: [publisher not identified], 1947.

MLA (9th ed.) Citation

Arnold, Chester A. An Introduction to Paleobotany. [publisher not identified], 1947.