APA (7th ed.) Citation

Sheppard, R. A. (1964). Geology of the Tygarts Valley quadrangle, Kentucky. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Sheppard, Richard A. Geology of the Tygarts Valley Quadrangle, Kentucky. Reston, Va.: U.S. Geological Survey, 1964.

MLA (9th ed.) Citation

Sheppard, Richard A. Geology of the Tygarts Valley Quadrangle, Kentucky. U.S. Geological Survey, 1964.

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