Dyfyniad APA

Westoff, L. A., & Westoff, C. F. (1971). From now to zero: Fertility, contraception and abortion in America. Little, Brown.

Dyfyniad Arddull Chicago

Westoff, Leslie Aldridge, and Charles F. Westoff. From Now to Zero: Fertility, Contraception and Abortion in America. Boston: Little, Brown, 1971.

Dyfyniad MLA

Westoff, Leslie Aldridge, and Charles F. Westoff. From Now to Zero: Fertility, Contraception and Abortion in America. Little, Brown, 1971.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.