1. Balko, R. (2013). Warrior Cops: The Militarization of America’s Police Force. Public Affairs.
2. Barger, R. with Zimmerman, K., & Zimmerman, K. (2001). Hell’s Angel: The Life and Times of Sonny Barger and the Hell’s Angels Motorcycle Club. Fourth Estate.
3. Barker, T. (2017a). Massacre at Waco: Biker Violence and Police Overreaction. American Journal of Criminal Justice, 42, 668–681.
4. Barker, T. (2017b). Motorcycle Clubs or Gangs on Wheels. In A. Bain & M. Lauchs (Eds.), Understanding the Outlaw Motorcycle Gangs: International Perspectives (pp. 7–27). Carolina Academic Press.
5. Blokland, A., Soudjin, M., & van der Leest, W. (2017). Outlaw Bikers in the Netherlands: Clubs, Social Criminal Organizations or Gangs? In A. Bain & M. Lauchs (Eds.), Understanding the Outlaw Motorcycle Gangs: International Perspectives (pp. 91–114). Carolina Academic Press.