APA (7th ed.) Citation

Knopf, E. F. B., & Jonas, A. I. (1929). Geology of the McCalls Ferry-Quarryville district, Pennsylvania. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Knopf, Eleanora Frances Bliss, and Anna I. Jonas. Geology of the McCalls Ferry-Quarryville District, Pennsylvania. [Washington, D.C.]: Department of the Interior, U.S. Geological Survey, 1929.

MLA (9th ed.) Citation

Knopf, Eleanora Frances Bliss, and Anna I. Jonas. Geology of the McCalls Ferry-Quarryville District, Pennsylvania. Department of the Interior, U.S. Geological Survey, 1929.