National Committee on Maternal Health (U.S.) & Engle, E. T. (2017). The problem of fertility: Proceedings of the Conference on Fertility held under the auspices of the National Committee on Maternal Health (Princeton legacy library edition.). Princeton University Press.
Cita Chicago Style (17a ed.)National Committee on Maternal Health (U.S.) y Earl T. Engle. The Problem of Fertility: Proceedings of the Conference on Fertility Held Under the Auspices of the National Committee on Maternal Health. Princeton legacy library edition. Princeton, N.J.: Princeton University Press, 2017.
Cita MLA (8a ed.)National Committee on Maternal Health (U.S.) y Earl T. Engle. The Problem of Fertility: Proceedings of the Conference on Fertility Held Under the Auspices of the National Committee on Maternal Health. Princeton legacy library edition. Princeton University Press, 2017.