@inbook{3289895,
author={Ludwik S. Szymanski, MD and Sandra L. Friedman, MD, MPH and Elizabeth L. Leonard, PhD},
editor={Ebert, Michael H. and Loosen, Peter T. and Nurcombe, Barry and Leckman, James F.},
title={Chapter 31. Intellectual Disability},
booktitle={CURRENT Diagnosis & Treatment: Psychiatry, 2e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2008},
url={accessmedicine.mhmedical.com/content.aspx?aid=3289895}
}