Southern Provinces, Nigeria. Education Dept, & Northern Provinces of Nigeria (Nigeria). Education Dept. Annual report on the Education Departments of Nigeria. Govt. Printer.
Παραπομπή σε μορφή Chicago (17η εκδ.)Southern Provinces, Nigeria. Education Dept, και Northern Provinces of Nigeria (Nigeria). Education Dept. Annual Report on the Education Departments of Nigeria. Lagos: Govt. Printer.
Παραπομπή σε μορφή MLA (8th εκδ.)Southern Provinces, Nigeria. Education Dept, και Northern Provinces of Nigeria (Nigeria). Education Dept. Annual Report on the Education Departments of Nigeria. Govt. Printer.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.