Guilianotti 2013, p. 14 Guilianotti, Richard (2013), "Chapter 2 Social identity and public order: political and academic discourses on football violence", in Guilianotti, Richard (ed.), Football, Violence and Social Identity, Routledge, pp. 14–15, ISBN978-1134859436
Clare quoted by Guilianotti 2013, p. 15. Guilianotti, Richard (2013), "Chapter 2 Social identity and public order: political and academic discourses on football violence", in Guilianotti, Richard (ed.), Football, Violence and Social Identity, Routledge, pp. 14–15, ISBN978-1134859436
Atyeo 1979, p. 315. Atyeo, Don (1979), Blood & guts, violence in sports (illustrated ed.), Paddington Press: distributed by Grosset & Dunlap, p. 315, ISBN978-0709200000