Cita APA (7a ed.)

Hagan, F. E. (1997). Research methods in criminal justice and criminology (4. ed.). Allyn and Bacon.

Cita Chicago Style (17a ed.)

Hagan, Frank E. Research Methods in Criminal Justice and Criminology. 4. ed. Boston, Mass. [u.a.]: Allyn and Bacon, 1997.

Cita MLA (9a ed.)

Hagan, Frank E. Research Methods in Criminal Justice and Criminology. 4. ed. Allyn and Bacon, 1997.