Cita APA (7a ed.)

Gottfredson, D. M., & Ballard, K. B. (1966). Offender classification and parole prediction. California Medical Facility.

Cita Chicago Style (17a ed.)

Gottfredson, Donald M., y Kelley B. Ballard. Offender Classification and Parole Prediction. Vacaville, Calif: California Medical Facility, 1966.

Cita MLA (8a ed.)

Gottfredson, Donald M., y Kelley B. Ballard. Offender Classification and Parole Prediction. California Medical Facility, 1966.