Não informado. (1982). Plant/Operations Progress. American Institute of Chemical Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Plant/Operations Progress. New York: American Institute of Chemical Engineers, 1982.
Lua MLA (8ú heag.)Não informado. Plant/Operations Progress. American Institute of Chemical Engineers, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.