APA (7th ed.) Citation

Girty, G. H. (1939). Some linguloid shells from the late Devonian and early carboniferous rocks of Pennsylvania and Ohio. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Girty, George Herbert. Some Linguloid Shells from the Late Devonian and Early Carboniferous Rocks of Pennsylvania and Ohio. Washington: United States Department of the Interior, Geological Survey, 1939.

MLA (9th ed.) Citation

Girty, George Herbert. Some Linguloid Shells from the Late Devonian and Early Carboniferous Rocks of Pennsylvania and Ohio. United States Department of the Interior, Geological Survey, 1939.