Committee on Education for Democratic Citizenship. (1942). Problems in American life. National Association of Secondary-School Principals,National council for the Social Studies.
Chicago-viite (17. p.)Committee on Education for Democratic Citizenship. Problems in American Life. Washington, D. C: National Association of Secondary-School Principals,National council for the Social Studies, 1942.
MLA-viite (9. p.)Committee on Education for Democratic Citizenship. Problems in American Life. National Association of Secondary-School Principals,National council for the Social Studies, 1942.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.