@inbook{7001715,
author={Alexandra Ryan, MD and Kimberley Dilley, MD, MPH},
editor={Goodman, Denise M. and Green, Thomas P. and Unti, Sharon M. and Powell, Elizabeth C.},
title={Chapter 44. Tympanometry},
booktitle={Current Procedures: Pediatrics},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2007},
url={accesspediatrics.mhmedical.com/content.aspx?aid=7001715}
}