UNAIDS. (1999). HIV/AIDS learning package for secondary school adolescents.
Chicago Style aipamenaUNAIDS. HIV/AIDS Learning Package for Secondary School Adolescents. 1999.
MLA aipamenaUNAIDS. HIV/AIDS Learning Package for Secondary School Adolescents. 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.