Cita APA (7a ed.)

Hackler, J., & Gauld, L. (1980). Parole and the violent offender. Violent crime study.

Cita Chicago Style (17a ed.)

Hackler, Jim, y Laurel Gauld. "Parole and the Violent Offender." Violent Crime Study 1980.

Cita MLA (9a ed.)

Hackler, Jim, y Laurel Gauld. "Parole and the Violent Offender." Violent Crime Study, 1980.