World Health Organization. (2006). Guidelines for safe recreational water environmnets: Swimming pools and similar environments. World Health organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Health Organization. Guidelines for Safe Recreational Water Environmnets: Swimming Pools and Similar Environments. Geneva: World Health organization, 2006.
Παραπομπή σε μορφή MLA (8th εκδ.)World Health Organization. Guidelines for Safe Recreational Water Environmnets: Swimming Pools and Similar Environments. World Health organization, 2006.
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