found: Lopez, D. Films by genre, c1993:pp. 124-128 (Gangster Film (Gang Film). A violent, well-documented genre. The gangster movie is rich in iconography and populated by well-defined gangster variants, e.g., the bootlegger, the racketeer, the hitman, or complementary characters--the moll, the shyster, the G-man, the hoodlum; subgenres: Black Gangster Films; Boxing Gangster Films; Cop Movies; Exposé Films; Film Noir; Gangster Biographies; Gangster Comedies; Gangster Musicals; G-Man Films; Heist Films (Caper Films); Hostage-Holding Gangster Movies; Outlaw Gangster Films (Bandit Gangster Films, Outlaw-Couple Films); Prison Films; Syndicate Films (Gangland Films, Organized-Crime Films, Syndicate-Oriented Films); Vigilante Films) pp. 173-174 (Mafia Films; usually included in the gangster genre)
found: Yee, M. Moving image materials, 1988(Gangster drama. Use for fictional genre films and programs which tend to be set in the city and focus on organized crime. However, include fictional genre films on the so-called "rural bandits" who drive about the countryside, e.g. robbing banks. UF Gangster films, Hoodlum drama, Mafia drama, Organized crime drama, Rural bandit drama. BT Crime drama. RT Film noir, Yakuza-eiga)