APA (7th ed.) Citation

(1977). Landslide susceptibility map of the Pittsburgh West quadrangle, Allegheny County, Pennsylvania. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Landslide Susceptibility Map of the Pittsburgh West Quadrangle, Allegheny County, Pennsylvania. Reston, VA: U.S. Geological Survey, 1977.

MLA (9th ed.) Citation

Landslide Susceptibility Map of the Pittsburgh West Quadrangle, Allegheny County, Pennsylvania. U.S. Geological Survey, 1977.

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