Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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