Não informado. (1959). Environmental health. Central Public Health Engineering Research Institute.
Chicago-Zitierstil (17. Ausg.)Não informado. Environmental Health. Nagpur, India: Central Public Health Engineering Research Institute, 1959.
MLA-Zitierstil (8. Ausg.)Não informado. Environmental Health. Central Public Health Engineering Research Institute, 1959.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.