Reif, A. G., & Sloto, R. A. (1997). Metals, pesticides, and semivolatile organic compounds in sediment in Valley Forge National Historical Park, Montgomery County, Pennsylvania. U.S. Geological Survey.
Chicago Style (17th ed.) CitationReif, Andrew G., and Ronald A. Sloto. Metals, Pesticides, and Semivolatile Organic Compounds in Sediment in Valley Forge National Historical Park, Montgomery County, Pennsylvania. Lemoyne, Pennsylvania: U.S. Geological Survey, 1997.
MLA (9th ed.) CitationReif, Andrew G., and Ronald A. Sloto. Metals, Pesticides, and Semivolatile Organic Compounds in Sediment in Valley Forge National Historical Park, Montgomery County, Pennsylvania. U.S. Geological Survey, 1997.
Warning: These citations may not always be 100% accurate.