@inbook{1114870915, author={Danyal Thaver, MBBS and Athar M. Qureshi, MD}, editor={Usatine, Richard P. and Sabella, Camille and Smith, Mindy Ann and Mayeaux, E.J. and Chumley, Heidi S. and Appachi, Elumalai}, title={Clubbing and Cyanosis}, booktitle={The Color Atlas of Pediatrics}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2015}, url={accesspediatrics.mhmedical.com/content.aspx?aid=1114870915} }