@inbook{6820240,
author={Robert M. Zollinger Jr and E. Christopher Ellison},
title={Plate 4},
booktitle={Zollinger's Atlas of Surgical Operations, 9e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2011},
url={accesssurgery.mhmedical.com/content.aspx?aid=6820240}
}