APA (7th ed.) Citation

Penrose, R. A. F., & Fairbanks, H. R. (1952). Life and letters of R. A. F. Penrose, Jr. [Geological Society of America].

Chicago Style (17th ed.) Citation

Penrose, R. A. F., and Helen R. Fairbanks. Life and Letters of R. A. F. Penrose, Jr. New York: [Geological Society of America], 1952.

MLA (9th ed.) Citation

Penrose, R. A. F., and Helen R. Fairbanks. Life and Letters of R. A. F. Penrose, Jr. [Geological Society of America], 1952.