APA (7th ed.) Citation

Morgan, B. A. (1972). Metamorphic map of the Appalachians. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Morgan, Benjamin A. Metamorphic Map of the Appalachians. Washington, D.C.: U.S. Geological Survey, 1972.

MLA (9th ed.) Citation

Morgan, Benjamin A. Metamorphic Map of the Appalachians. U.S. Geological Survey, 1972.

Warning: These citations may not always be 100% accurate.