Rickards, M. (1972). The world fights crime. Longman.
Cita Chicago Style (17a ed.)Rickards, Maurice. The World Fights Crime. London: Longman, 1972.
Cita MLA (8a ed.)Rickards, Maurice. The World Fights Crime. Longman, 1972.
Precaución: Estas citas no son 100% exactas.