Nigeria. Dept. of Labour. Annual report on the Department of Labour, Nigeria. Govt. Printer.
Chicago-viite (17. p.)Nigeria. Dept. of Labour. Annual Report on the Department of Labour, Nigeria. Lagos: Govt. Printer.
MLA-viite (8. p.)Nigeria. Dept. of Labour. Annual Report on the Department of Labour, Nigeria. Govt. Printer.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.