Não informado. (1969). Environmental Health. Environmental Health Officers Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Environmental Health. London: Environmental Health Officers Association, 1969.
MLA-Zitierstil (8. Ausg.)Não informado. Environmental Health. Environmental Health Officers Association, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.