Não informado. (1989). Education Today. Ontario Public School Board's Association.
Chicago Style (17. basım) AtıfNão informado. Education Today. Toronto, Canada: Ontario Public School Board's Association, 1989.
MLA (8th ed.) AtıfNão informado. Education Today. Ontario Public School Board's Association, 1989.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..