Lisken, H. (1987). Polizei in Düsseldorf.
Cita Chicago (17th ed.)Lisken, Hans. Polizei in Düsseldorf. Düsseldorf, 1987.
Cita MLA (8th ed.)Lisken, Hans. Polizei in Düsseldorf. 1987.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)