Hoerder, D. (1973). Violence in the United States, riots, strikes, protest and suppression: A working bibliography for teachers and students. Berlin: Freie Universität, John F. Kennedy-Institut für Nordamerikastudien.

Hoerder, Dirk. Violence in the United States, Riots, Strikes, Protest and Suppression: A Working Bibliography for Teachers and Students. Berlin: Freie Universität, John F. Kennedy-Institut für Nordamerikastudien, 1973.

Hoerder, Dirk. Violence in the United States, Riots, Strikes, Protest and Suppression: A Working Bibliography for Teachers and Students. Berlin: Freie Universität, John F. Kennedy-Institut für Nordamerikastudien, 1973.