Northern Nigeria (Nigeria). Ministry of Health. Annual report of the Ministry of Health, Northern Nigeria. Govt. Printer.
Lua i Stíl Chicago (17ú heag.)Northern Nigeria (Nigeria). Ministry of Health. Annual Report of the Ministry of Health, Northern Nigeria. Kaduna: Govt. Printer.
Lua MLA (8ú heag.)Northern Nigeria (Nigeria). Ministry of Health. Annual Report of the Ministry of Health, Northern Nigeria. Govt. Printer.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.