@inbook{57851093,
author={Kim E. Barrett},
title={Chapter 14. Ammonia and Urea},
booktitle={Gastrointestinal Physiology, 2e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2014},
url={accessbiomedicalscience.mhmedical.com/content.aspx?aid=57851093}
}