Cita APA (7a ed.)

Hagan, F. E. (2012). Essentials of research methods in criminal justice and criminology (3. ed.). Prentice Hall.

Cita Chicago Style (17a ed.)

Hagan, Frank E. Essentials of Research Methods in Criminal Justice and Criminology. 3. ed. Boston Munich [u.a.]: Prentice Hall, 2012.

Cita MLA (8a ed.)

Hagan, Frank E. Essentials of Research Methods in Criminal Justice and Criminology. 3. ed. Prentice Hall, 2012.