Denis, F. (1995). Management training of senior police officers: A survey of seven West-European countries / Frank Denis (Team Consult Belgium). Fachhochschule Villingen-Schwenningen Hochschule für Polizei.
Lua i Stíl Chicago (17ú heag.)Denis, Frank. Management Training of Senior Police Officers: A Survey of Seven West-European Countries / Frank Denis (Team Consult Belgium). Villingen-Schwenningen: Fachhochschule Villingen-Schwenningen Hochschule für Polizei, 1995.
Lua MLA (8ú heag.)Denis, Frank. Management Training of Senior Police Officers: A Survey of Seven West-European Countries / Frank Denis (Team Consult Belgium). Fachhochschule Villingen-Schwenningen Hochschule für Polizei, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.