Não informado. (1969). Research in Reproduction. International Planned Parenthood Federation.
Chicagoスタイル(17版)引用形式Não informado. Research in Reproduction. London: International Planned Parenthood Federation, 1969.
MLA(8版)引用形式Não informado. Research in Reproduction. International Planned Parenthood Federation, 1969.
警告: この引用は必ずしも正確ではありません.