Não informado. (1971). Environmental Health Review. Canadian Institute of Public Health Inspectors.
Citação do estilo Chicago (17ª ed.)Não informado. Environmental Health Review. Ontario, Canada: Canadian Institute of Public Health Inspectors, 1971.
Citação MLA (8ª ed.)Não informado. Environmental Health Review. Canadian Institute of Public Health Inspectors, 1971.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.