@inbook{1113010318, author={Elizabeth R. Northrop, DPT, PT and Cynthia E. Neville, DPT, PT, WCS}, editor={Shamus, Eric}, title={COCCYDYNIA}, booktitle={The Color Atlas of Physical Therapy}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2015}, url={accessphysiotherapy.mhmedical.com/content.aspx?aid=1113010318} }