APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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