Karpf, S. L. (1970). The gangster film: Emergence, variation, and decay of a genre, 1930-1940. Arno Press.
Lua i Stíl Chicago (17ú heag.)Karpf, Stephen Louis. The Gangster Film: Emergence, Variation, and Decay of a Genre, 1930-1940. New York: Arno Press, 1970.
Lua MLA (9ú heag.)Karpf, Stephen Louis. The Gangster Film: Emergence, Variation, and Decay of a Genre, 1930-1940. Arno Press, 1970.
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