"Pertussis (Whooping Cough) – What You Need To Know." Centers for Disease Control and Prevention. Web. 23 Nov. 2010. <http://www.cdc.gov/features/pertussis/>.
Chapter 242 Fred Heldrich “primary Pediatric Care” second edition
"Pertussis: Pediatrics: General Medicine." EMedicine - Medical Reference. Web. <http://emedicine.medscape.com/article/967268-overview>.
"Pertussis (Whooping Cough) Vaccine and Immunization Information." National Network for Immunization Information (NNii). Web. <http://www.nnii.org/vaccineInfo/vaccine_detail.cfv?id=22>.