Não informado. (1999). High school magazine: For principals, assistant principals, and all high school leaders. National Association of Secondary School Principals.
Chicago-viite (17. p.)Não informado. High School Magazine: For Principals, Assistant Principals, and All High School Leaders. Reston, Va: National Association of Secondary School Principals, 1999.
MLA-viite (8. p.)Não informado. High School Magazine: For Principals, Assistant Principals, and All High School Leaders. National Association of Secondary School Principals, 1999.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.