World Health Organization. (1999). WHO information series on school health: Document six : preventing HIV/AIDS/STI and related discrimination : an important responsibility of health-promoting schools. World Health Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Health Organization. WHO Information Series on School Health: Document Six : Preventing HIV/AIDS/STI and Related Discrimination : An Important Responsibility of Health-promoting Schools. Geneva: World Health Organization, 1999.
Παραπομπή σε μορφή MLA (8th εκδ.)World Health Organization. WHO Information Series on School Health: Document Six : Preventing HIV/AIDS/STI and Related Discrimination : An Important Responsibility of Health-promoting Schools. World Health Organization, 1999.
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