C. Hunter Shelden, M.D., (November 5, 1955). "Prevention, the only cure for head injuries resulting from automobile accidents". Journal of the American Medical Association. 159 (10): 981–6. doi:10.1001/jama.1955.02960270001001. PMID13263134.CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link)
National Highway Traffic Safety Administration, Plans and Programs, Office of Planning and Analysis (11 July 1984). Passenger Car Front Seat Occupant Protection(PDF) (Laporan). m/s. IV-2. Dicapai pada 2016-02-14.CS1 maint: multiple names: authors list (link)
C. Hunter Shelden, M.D., (November 5, 1955). "Prevention, the only cure for head injuries resulting from automobile accidents". Journal of the American Medical Association. 159 (10): 981–6. doi:10.1001/jama.1955.02960270001001. PMID13263134.CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors list (link)