United States. Environmental Protection Agency, Keith, L. H., Mueller, W., & Smith, D. L. (1991). Compilation of E.P.A.'s sampling and analysis methods. Lewis Publishers.
Chicago Style (17th ed.) CitationUnited States. Environmental Protection Agency, Lawrence H. Keith, William Mueller, and David L. Smith. Compilation of E.P.A.'s Sampling and Analysis Methods. Boca Raton, Fla.: Lewis Publishers, 1991.
MLA (9th ed.) CitationUnited States. Environmental Protection Agency, et al. Compilation of E.P.A.'s Sampling and Analysis Methods. Lewis Publishers, 1991.
Warning: These citations may not always be 100% accurate.