Não informado. (1951). Chemical Industries Week. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Não informado. Chemical Industries Week. New York: McGraw-Hill, 1951.
Lua MLA (8ú heag.)Não informado. Chemical Industries Week. McGraw-Hill, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.