Block, C. R., & Block, R. (1980). Patterns of change in Chicago homicide: The twenties, the sixties and the seventies (2nd ed.). Criminal Justice Information Systems.
Chicago Style (17th ed.) CitationBlock, Carolyn R., and Richard Block. Patterns of Change in Chicago Homicide: The Twenties, the Sixties and the Seventies. 2nd ed. Chicago: Criminal Justice Information Systems, 1980.
MLA (9th ed.) CitationBlock, Carolyn R., and Richard Block. Patterns of Change in Chicago Homicide: The Twenties, the Sixties and the Seventies. 2nd ed. Criminal Justice Information Systems, 1980.
Warning: These citations may not always be 100% accurate.