World Health Organization & Cassel, J. (1970). The Education and training of engineers for environmental health. World Health Organization.
Chicago-referens (17:e uppl.)World Health Organization och John Cassel. The Education and Training of Engineers for Environmental Health. Geneva: World Health Organization, 1970.
MLA-referens (8:e uppl.)World Health Organization och John Cassel. The Education and Training of Engineers for Environmental Health. World Health Organization, 1970.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.