Não informado. (1991). Safety science. Elsevier Science Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Safety Science. Amsterdam: Elsevier Science Publishers, 1991.
Lua MLA (8ú heag.)Não informado. Safety Science. Elsevier Science Publishers, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.