Engro Chemical Pakistan Ltd. (1992). Annual report. Engro Chemical Pakistan Ltd..
Lua i Stíl Chicago (17ú heag.)Engro Chemical Pakistan Ltd. Annual Report. Karachi: Engro Chemical Pakistan Ltd., 1992.
Lua MLA (8ú heag.)Engro Chemical Pakistan Ltd. Annual Report. Engro Chemical Pakistan Ltd., 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.