DAVIS, M. L. (1991). Introduction To Environmental Engineering Mackenzie L. Davis And David A. Cornwell. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)DAVIS, Mackenzie L. Introduction To Environmental Engineering Mackenzie L. Davis And David A. Cornwell. McGraw-Hill, 1991.
Lua MLA (8ú heag.)DAVIS, Mackenzie L. Introduction To Environmental Engineering Mackenzie L. Davis And David A. Cornwell. McGraw-Hill, 1991.
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