Não informado. (1969). Family Planning Perspectives. Allan Guttmacher Institute.
Chicagoスタイル(17版)引用形式Não informado. Family Planning Perspectives. New York: Allan Guttmacher Institute, 1969.
MLA(8版)引用形式Não informado. Family Planning Perspectives. Allan Guttmacher Institute, 1969.
警告: この引用は必ずしも正確ではありません.