Não informado. (1971). Environmental health and safety news. University of Washington, Environmental Research Laboratory.
Chicago-Zitierstil (17. Ausg.)Não informado. Environmental Health and Safety News. Seattle, Wash: University of Washington, Environmental Research Laboratory, 1971.
MLA-Zitierstil (8. Ausg.)Não informado. Environmental Health and Safety News. University of Washington, Environmental Research Laboratory, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.