National Council for the Social Studies. Social education. Naitonal Council for the Social Studies.
Chicago-referens (17:e uppl.)National Council for the Social Studies. Social Education. Washington: Naitonal Council for the Social Studies.
MLA-referens (9:e uppl.)National Council for the Social Studies. Social Education. Naitonal Council for the Social Studies.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.