Schaefer, M. (1974). Administration of environmental health programmes: A systems view. World Health Organization.
Citace podle Chicago (17th ed.)Schaefer, Morris. Administration of Environmental Health Programmes: A Systems View. Geneva: World Health Organization, 1974.
Citace podle MLA (9th ed.)Schaefer, Morris. Administration of Environmental Health Programmes: A Systems View. World Health Organization, 1974.
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