@inbook{1117771795, author={F. Gary Cunningham and Kenneth J. Leveno and Steven L. Bloom and Catherine Y. Spong and Jodi S. Dashe and Barbara L. Hoffman and Brian M. Casey and Jeanne S. Sheffield}, title={Parto vaginal quirúrgico}, booktitle={Williams. Obstetricia, 24e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2015}, url={accessmedicina.mhmedical.com/content.aspx?aid=1117771795} }