APA (7th ed.) Citation

Dutton, C. E. (1931). Some of the greater problems of physical geology. Bulletin of the National Research Council., 78, 201.

Chicago Style (17th ed.) Citation

Dutton, C. E. "Some of the Greater Problems of Physical Geology." Bulletin of the National Research Council. 78 (1931): 201.

MLA (9th ed.) Citation

Dutton, C. E. "Some of the Greater Problems of Physical Geology." Bulletin of the National Research Council., vol. 78, 1931, p. 201.