ROSA, F. (1987). Water treatmant specification manual. McGraw-Hill Bo. Co.
Lua i Stíl Chicago (17ú heag.)ROSA, Frank. Water Treatmant Specification Manual. New York: McGraw-Hill Bo. Co, 1987.
Lua MLA (9ú heag.)ROSA, Frank. Water Treatmant Specification Manual. McGraw-Hill Bo. Co, 1987.
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