HAGAN, F. E. (1997). Research methods in criminal justice and criminology. Allyn and Bacon.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHAGAN, Frank E. Research Methods in Criminal Justice and Criminology. Boston: Allyn and Bacon, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHAGAN, Frank E. Research Methods in Criminal Justice and Criminology. Allyn and Bacon, 1997.
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