@inbook{1120413484,
author={Alex Simon, MD and Wendy Y. Chang, MD and Alan H. DeCherney, MD},
editor={DeCherney, Alan H. and Nathan, Lauren and Laufer, Neri and Roman, Ashley S.},
title={Amenorrea},
booktitle={Diagnóstico y tratamiento ginecoobstétricos, 11e},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2015},
url={accessmedicina.mhmedical.com/content.aspx?aid=1120413484}
}