Cita APA (7a ed.)

Silvis, J., & Williams, K. (1995). Managing the drug problem: Tolerance or prohibition? Criminal justice in Europe, 149-169.

Cita Chicago Style (17a ed.)

Silvis, Jos, y Katherine Williams. "Managing the Drug Problem: Tolerance or Prohibition?" Criminal Justice in Europe 1995: 149-169.

Cita MLA (9a ed.)

Silvis, Jos, y Katherine Williams. "Managing the Drug Problem: Tolerance or Prohibition?" Criminal Justice in Europe, 1995, pp. 149-169.