Não informado. (1991). Engineering and automation. Siemens Aktiengesellschaft.
Lua i Stíl Chicago (17ú heag.)Não informado. Engineering and Automation. Berlin: Siemens Aktiengesellschaft, 1991.
Lua MLA (8ú heag.)Não informado. Engineering and Automation. Siemens Aktiengesellschaft, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.