Lisken, H. (1993). Polizei in Düsseldorf.
Cita Chicago (17th ed.)Lisken, Hans. Polizei in Düsseldorf. Düsseldorf, 1993.
Cita MLA (8th ed.)Lisken, Hans. Polizei in Düsseldorf. 1993.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)