@inbook{1143141136, 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={Ectopic Pregnancy and Emergencies in The First 20 Weeks of Pregnancy}, booktitle={Tintinalli's Emergency Medicine Manual, 8e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={accessemergencymedicine.mhmedical.com/content.aspx?aid=1143141136} }