@inbook{1157394836, author={Robert Jones}, editor={Cydulka, Rita K. and Fitch, Michael T. and Joing, Scott A. and Wang, Vincent J. and Cline, David M. and Ma, O. John}, title={Embarazo ectópico y urgencias en las primeras 20 semanas de embarazo}, booktitle={Manual de Urgencias Médicas de Tintinalli, 8e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2018}, url={accessmedicina.mhmedical.com/content.aspx?aid=1157394836} }