Ear infection (otitis externa). Patient. http://www.patient.co.uk/health/otitis-externa. Updated October 10, 2013. Accessed August 29, 2014.
Centers for Disease Control and Prevention. Healthy swimming. Swimmer’s ear (otitis externa). http://www.cdc.gov/healthywater/swimming/swimmers/rwi/ear-infections.html. Updated May 4, 2016. Accessed July 2016.
Schaefer P, Baugh RF. Acute otitis externa: an update. American Family Physician. Am Fam Physician. 2012 Dec 1;86(11):1055-1061. http://www.aafp.org/afp/2012/1201/p1055.html. Accessed August 2016.