(2000). Youth in a Difficult World. National Institute of Mental Health.
Chicago-viite (17. p.)Youth in a Difficult World. National Institute of Mental Health, 2000.
MLA-viite (9. p.)Youth in a Difficult World. National Institute of Mental Health, 2000.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.