Não informado. (1977). Perception. Canadian Council on Social Development.
Chicagoスタイル(17版)引用形式Não informado. Perception. Ottawa: Canadian Council on Social Development, 1977.
MLA(8版)引用形式Não informado. Perception. Canadian Council on Social Development, 1977.
警告: この引用は必ずしも正確ではありません.