Cita APA (7a ed.)

Hagan, F. E. (2005). Essentials of research methods in criminal justice and criminology. Pearson/Allyn and Bacon.

Cita Chicago Style (17a ed.)

Hagan, Frank E. Essentials of Research Methods in Criminal Justice and Criminology. Boston [u.a.]: Pearson/Allyn and Bacon, 2005.

Cita MLA (8a ed.)

Hagan, Frank E. Essentials of Research Methods in Criminal Justice and Criminology. Pearson/Allyn and Bacon, 2005.