EmergencyCareForYou: Neck or back injury. American College of Emergency Physicians. http://www.emergencycareforyou.org/emergency-101/neck-or-back-injury/#sm.0001pfsh0ksz9fdgr3c1gytcsyycs. Accessed Dec. 27, 2018.
First Aid/CPR/AED participant's manual. American Red Cross. https://embed.widencdn.net/pdf/plus/americanredcross/8chdrkbqij/FA_CPR_AED_PM_Optimized.pdf?u=0aormr. Accessed Dec. 27, 2018.