Não informado. (2001). Annual report on the Agricultural Department, Nigeria. Department of Agriculture.
Chicago-referens (17:e uppl.)Não informado. Annual Report on the Agricultural Department, Nigeria. Lagos: Department of Agriculture, 2001.
MLA-referens (8:e uppl.)Não informado. Annual Report on the Agricultural Department, Nigeria. Department of Agriculture, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.