Hallett, H. V. (1975). Survey of the present and former police forces of England, Wales and the Channel Islands. International Police Association.
Chicago-Zitierstil (17. Ausg.)Hallett, H. V. Survey of the Present and Former Police Forces of England, Wales and the Channel Islands. Nottingham: International Police Association, 1975.
MLA-Zitierstil (9. Ausg.)Hallett, H. V. Survey of the Present and Former Police Forces of England, Wales and the Channel Islands. International Police Association, 1975.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.