Não informado. (1972). Process technology international. IPC Industrial Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Process Technology International. London: IPC Industrial Press, 1972.
Lua MLA (8ú heag.)Não informado. Process Technology International. IPC Industrial Press, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.