Não informado. (1974). History and social science teacher. Ontario History and Social Science Teachers Association.
Chicago-Zitierstil (17. Ausg.)Não informado. History and Social Science Teacher. Toronto, Canada: Ontario History and Social Science Teachers Association, 1974.
MLA-Zitierstil (8. Ausg.)Não informado. History and Social Science Teacher. Ontario History and Social Science Teachers Association, 1974.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.