Cita APA (7a ed.)

Gibb, A., & Duff, P. (2002). Criminal justice systems in Europe. Criminal justice systems in Europe.

Cita Chicago Style (17a ed.)

Gibb, Alex, y Peter Duff. "Criminal Justice Systems in Europe." Criminal Justice Systems in Europe 2002.

Cita MLA (8a ed.)

Gibb, Alex, y Peter Duff. "Criminal Justice Systems in Europe." Criminal Justice Systems in Europe, 2002.