Cita APA (7a ed.)

Westoff, L. A., & Westoff, C. F. (1971). From now to zero: Fertility, contraception and abortion in America (1. print.). Little, Brown Comp.

Cita Chicago Style (17a ed.)

Westoff, Leslie A., y Charles F. Westoff. From Now to Zero: Fertility, Contraception and Abortion in America. 1. print. Boston Toronto: Little, Brown Comp, 1971.

Cita MLA (8a ed.)

Westoff, Leslie A., y Charles F. Westoff. From Now to Zero: Fertility, Contraception and Abortion in America. 1. print. Little, Brown Comp, 1971.