DAVIS, M. L., & CORNWELL, D. A. (1991). Introduction to environmental engineering.-- ed.2. McGraw-Hill Inc.
Lua i Stíl Chicago (17ú heag.)DAVIS, Mackenzie L., agus David A. CORNWELL. Introduction to Environmental Engineering.-- Ed.2. New York: McGraw-Hill Inc, 1991.
Lua MLA (9ú heag.)DAVIS, Mackenzie L., agus David A. CORNWELL. Introduction to Environmental Engineering.-- Ed.2. McGraw-Hill Inc, 1991.
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