APA (7th ed.) Citation

(1972). Geologic map of the Oak Forest quadrangle and part of the Blacksville quadrangle, southwestern Pennsylvania. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geologic Map of the Oak Forest Quadrangle and Part of the Blacksville Quadrangle, Southwestern Pennsylvania. Washington, D.C: U.S. Geological Survey, 1972.

MLA (9th ed.) Citation

Geologic Map of the Oak Forest Quadrangle and Part of the Blacksville Quadrangle, Southwestern Pennsylvania. U.S. Geological Survey, 1972.

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