APA (7th ed.) Citation

Briggs, R. P. (1977). Environmental geology, Allegheny County and vicinity, Pennsylvania: Description of a program and its results. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Briggs, Reginald P. Environmental Geology, Allegheny County and Vicinity, Pennsylvania: Description of a Program and Its Results. [Reston, Virginia]: United States Department of the Interior, Geological Survey, 1977.

MLA (9th ed.) Citation

Briggs, Reginald P. Environmental Geology, Allegheny County and Vicinity, Pennsylvania: Description of a Program and Its Results. United States Department of the Interior, Geological Survey, 1977.