Não informado. (1971). Environmental Health Review. Canadian Institute of Public Health Inspectors.
Cita Chicago Style (17a ed.)Não informado. Environmental Health Review. Ontario, Canada: Canadian Institute of Public Health Inspectors, 1971.
Cita MLA (8a ed.)Não informado. Environmental Health Review. Canadian Institute of Public Health Inspectors, 1971.
Precaución: Estas citas no son 100% exactas.