American Academy of Pediatrics. Parainfluenza Viral Infections. In: Kimberlin DW, Brady MT, Jackson MA, Long SS, eds. Red Book: 2015 Report of the Committee on Infectious Diseases. 30th ed. Elk Grove Village, IL: American Academy of Pediatrics; 2015.
CDC. Guidelines for preventing health-care--associated pneumonia, 2003: recommendations of CDC and the Healthcare Infection Control Practices Advisory Committee. MMWR. 2004; 53(RR-03):1-36.
Glezen WP, Denny FW. Parainfluenza viruses in: Evans A, Kaslow R, eds. Viral infections in humans: epidemiology and control. 4th ed. New York: Plenum; 1997:551-67.