Não informado. (1980). Family Relations. National Council on Family Relations.
Chicagoスタイル(17版)引用形式Não informado. Family Relations. Saint Paul, Minn: National Council on Family Relations, 1980.
MLA(8版)引用形式Não informado. Family Relations. National Council on Family Relations, 1980.
警告: この引用は必ずしも正確ではありません.