@inbook{56096963,
author={Anna L. Chien and John J. Voorhees and Sewon Kang},
editor={Goldsmith, Lowell A. and Katz, Stephen I. and Gilchrest, Barbara A. and Paller, Amy S. and Leffell, David J. and Wolff, Klaus},
title={Chapter 217. Topical Retinoids},
booktitle={Fitzpatrick's Dermatology in General Medicine, 8e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2012},
url={accessmedicine.mhmedical.com/content.aspx?aid=56096963}
}