@inbook{1135016300, author={Richard A. Clendaniel, PT, PhD}, editor={Herdman, Susan J. and Clendaniel, Richard A.}, title={Differential Diagnosis: BPPV versus Central Postional Nystagmus and Vertigo}, booktitle={Vestibular Rehabilitation}, publisher={F. A. Davis Company}, address={New York, NY}, year={2014}, url={fadavispt.mhmedical.com/content.aspx?aid=1135016300} }