@inbook{1192297367, author={Catherine Y. Spong}, editor={Cunningham, F. Gary and Leveno, Kenneth J. and Dashe, Jodi S. and Hoffman, Barbara L. and Spong, Catherine Y. and Casey, Brian M.}, title={Anormalidades placentarias}, booktitle={Williams Obstetricia, 26e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2021}, url={accessmedicina.mhmedical.com/content.aspx?aid=1192297367} }