APA (7th ed.) Citation

Chester, F. D. (1890). The gabbros and associated rocks in Delaware. Department of the Interior, United States Geological Survey.

Chicago Style (17th ed.) Citation

Chester, Frederick D. The Gabbros and Associated Rocks in Delaware. Washington, D.C.: Department of the Interior, United States Geological Survey, 1890.

MLA (9th ed.) Citation

Chester, Frederick D. The Gabbros and Associated Rocks in Delaware. Department of the Interior, United States Geological Survey, 1890.