O'Bryan, D., & McAvoy, R. L. (1966). Gunpowder Falls Maryland: Uses of a water resource today and tomorrow. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationO'Bryan, Deric, and Russell L. McAvoy. Gunpowder Falls Maryland: Uses of a Water Resource Today and Tomorrow. Washington, D.C.: United States Department of the Interior, Geological Survey, 1966.
MLA (9th ed.) CitationO'Bryan, Deric, and Russell L. McAvoy. Gunpowder Falls Maryland: Uses of a Water Resource Today and Tomorrow. United States Department of the Interior, Geological Survey, 1966.
Warning: These citations may not always be 100% accurate.