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Lua i Stíl Chicago (17ú heag.)Drew,Christina H. Duivenboden, Jaco Van Bonnefoy,Xavier. Guidelines for Evaluation of Environmental Health Services. Denmark: World Health Organization, 2000.
Lua MLA (8ú heag.)Drew,Christina H. Duivenboden, Jaco Van Bonnefoy,Xavier. Guidelines for Evaluation of Environmental Health Services. World Health Organization, 2000.
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