UNAIDS. (1999). HIV/AIDS learning package for secondary school adolescents.
Cita Chicago (17th ed.)UNAIDS. HIV/AIDS Learning Package for Secondary School Adolescents. 1999.
Cita MLA (8th ed.)UNAIDS. HIV/AIDS Learning Package for Secondary School Adolescents. 1999.
Atenció: Aquestes cites poden no estar 100% correctes.