@inbook{1130418064, author={Robert J. Yetman and Mark D. Hormann}, title={The Respiratory System}, booktitle={Pediatrics: PreTest® Self-Assessment and Review, 14e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2016}, url={accesspediatrics.mhmedical.com/content.aspx?aid=1130418064} }