KIRK OTHMER. (1998). ENCYCLOPEDIA OF CHEMICAL TECHNOLOGY,V-25,4TH ED. JOHN WILEY.
Lua i Stíl Chicago (17ú heag.)KIRK OTHMER. ENCYCLOPEDIA OF CHEMICAL TECHNOLOGY,V-25,4TH ED. NEW-YORK: JOHN WILEY, 1998.
Lua MLA (9ú heag.)KIRK OTHMER. ENCYCLOPEDIA OF CHEMICAL TECHNOLOGY,V-25,4TH ED. JOHN WILEY, 1998.
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