Kedward, R., Roberts, J., & Morgan, R. (1968). Thunder on the left: Socialism, anarchism, violence. London: Purnell.
Lua i Stíl Chicago (17ú heag.)Kedward, Roderick, J.M Roberts, agus Roger Morgan. Thunder on the Left: Socialism, Anarchism, Violence. London: Purnell, 1968.
Lua MLA (8ú heag.)Kedward, Roderick, et al. Thunder on the Left: Socialism, Anarchism, Violence. London: Purnell, 1968.
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