APA-viite

Helberger, N. (2005). Controlling access to content: Regulating conditional access in digital broadcasting. Kluwer law international.

Chicago-tyylinen lähdeviittaus

Helberger, Natali. Controlling Access to Content: Regulating Conditional Access in Digital Broadcasting. Netherlands: Kluwer law international, 2005.

MLA-viite

Helberger, Natali. Controlling Access to Content: Regulating Conditional Access in Digital Broadcasting. Kluwer law international, 2005.