(2002). Sokaiya: Extortion, protection, and the Japanese corporation / Kenneth Szymkowiak.
Cita Chicago (17th ed.)Sokaiya: Extortion, Protection, and the Japanese Corporation / Kenneth Szymkowiak. 2002.
Cita MLA (9th ed.)Sokaiya: Extortion, Protection, and the Japanese Corporation / Kenneth Szymkowiak. 2002.
Atenció: Aquestes cites poden no estar 100% correctes.