@inbook{1146616168, author={Richard M. Levitan and George Kovacs}, editor={Hung, Orlando R. and Murphy, Michael F.}, title={Direct Laryngoscopy}, booktitle={Hung's Difficult and Failed Airway Management, 3e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2017}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=1146616168} }