Não informado. (1969). Elements. University of Alberta, Department of Elementary Education.
Style de citation Chicago (17e éd.)Não informado. Elements. Alberta, Canada: University of Alberta, Department of Elementary Education, 1969.
Style de citation MLA (8e éd.)Não informado. Elements. University of Alberta, Department of Elementary Education, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.