APA aipamena

Hawkins, K. O. (1971). Parole selection: The American experience. University of Cambridge.

Chicago Style aipamena

Hawkins, Keith Owen. Parole Selection: The American Experience. University of Cambridge, 1971.

MLA aipamena

Hawkins, Keith Owen. Parole Selection: The American Experience. University of Cambridge, 1971.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.