Autor de: Hell's angel... 2015: (/ Ralph "Sonny" Barger; orelha: membro do chapter de Cave Creek do Hell's Angels Motorcycle Club)

http://authorities.loc.gov 16/3/2017: (rem.)

http://viaf.org/processed/BNF%7C14152923: (membro do Hell's angels motorcycle club; d.n.)

http://viaf.org/processed/NTA%7C202809943: (d.n., rem.)