Westoff, L. A. (1971). From now to zero: Fertility, conception and abortion in America. Little, Brown and Co..
芝加哥风格引文Westoff, Leslie Aldridge. From Now to Zero: Fertility, Conception and Abortion in America. Boston: Little, Brown and Co., 1971.
MLA引文Westoff, Leslie Aldridge. From Now to Zero: Fertility, Conception and Abortion in America. Little, Brown and Co., 1971.
警告：这些引文格式不一定是100％准确.