Northern Provinces of Nigeria (Nigeria). Police Dept. (1917). Annual report on the Police Department, Northern Provinces, for the year .. Govt. Printer.
Chicago Style aipamenaNorthern Provinces of Nigeria (Nigeria). Police Dept. Annual Report on the Police Department, Northern Provinces, for the Year .. Lagos: Govt. Printer, 1917.
MLA aipamenaNorthern Provinces of Nigeria (Nigeria). Police Dept. Annual Report on the Police Department, Northern Provinces, for the Year .. Govt. Printer, 1917.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.