APA Format
World Health Organization (WHO) . (). Young people,s health a challenge for society, TRS.731. : Geneva WHO 1986
MLA Format
World Health Organization (WHO) . Young people,s health a challenge for society, TRS.731. : Geneva WHO 1986,
Australian/Harvard Format
World Health Organization (WHO) . . Young people,s health a challenge for society, TRS.731. Geneva WHO 1986, 
Warning: These citations may not always be 100% accurate.