Não informado. (1969). Ontario education. Ontario Public School Trustees Association.
Style de citation Chicago (17e éd.)Não informado. Ontario Education. Toronto, Canada: Ontario Public School Trustees Association, 1969.
Style de citation MLA (8e éd.)Não informado. Ontario Education. Ontario Public School Trustees Association, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.