World Health Organization. (1981). Health aspects of treated sewage reuse. Copenhagen: The Organization.
Citación estilo ChicagoWorld Health Organization. Health Aspects of Treated Sewage Reuse. Copenhagen: The Organization, 1981.
Cita MLAWorld Health Organization. Health Aspects of Treated Sewage Reuse. Copenhagen: The Organization, 1981.
Precaución: Estas citas no son 100% exactas.