Não informado. (1989). Education Today. Ontario Public School Board's Association.
Chicagoスタイル(17版)引用形式Não informado. Education Today. Toronto, Canada: Ontario Public School Board's Association, 1989.
MLA(8版)引用形式Não informado. Education Today. Ontario Public School Board's Association, 1989.
警告: この引用は必ずしも正確ではありません.