Cita APA (7a ed.)

Research Conference on Natural Family Planning (1972: Warrenton (Virginia)), Williams, M. K., & Uricchio, W. A. (1973). Proceedings of a research conference on natural family planning. The Human Life Foundation.

Cita Chicago Style (17a ed.)

Research Conference on Natural Family Planning (1972: Warrenton (Virginia)), Mary Kay Williams, y William A. Uricchio. Proceedings of a Research Conference on Natural Family Planning. Washington, D.C.: The Human Life Foundation, 1973.

Cita MLA (9a ed.)

Research Conference on Natural Family Planning (1972: Warrenton (Virginia)), et al. Proceedings of a Research Conference on Natural Family Planning. The Human Life Foundation, 1973.