APA (7th ed.) Citation

Pipiringos, G. N., & O'Sullivan, R. B. (1978). Principal unconformities in Triassic and Jurassic rocks, western interior United States: A preliminary survey. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Pipiringos, G. N., and Robert Brett O'Sullivan. Principal Unconformities in Triassic and Jurassic Rocks, Western Interior United States: A Preliminary Survey. Washington: United States Department of the Interior, Geological Survey, 1978.

MLA (9th ed.) Citation

Pipiringos, G. N., and Robert Brett O'Sullivan. Principal Unconformities in Triassic and Jurassic Rocks, Western Interior United States: A Preliminary Survey. United States Department of the Interior, Geological Survey, 1978.