KALU Dike N. (2004). Science and technology in Nigeria. Barloz Publishers.
Chicago-čujuhus (17. p.)KALU Dike N. Science and Technology in Nigeria. Barloz Publishers, 2004.
MLA-čujuhus (9. p.)KALU Dike N. Science and Technology in Nigeria. Barloz Publishers, 2004.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.