Nigeria. Office of Statistics. Trade report. Federal Ministry of Information, Printing Division.
Chicago-referens (17:e uppl.)Nigeria. Office of Statistics. Trade Report. Lagos: Federal Ministry of Information, Printing Division.
MLA-referens (8:e uppl.)Nigeria. Office of Statistics. Trade Report. Federal Ministry of Information, Printing Division.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.