Isichei, A. O. (2014). Vegetation. Nigerian Environmental Study/Action Team.
Chicago-čujuhus (17. p.)Isichei, A. O. Vegetation. Nigerian Environmental Study/Action Team, 2014.
MLA-čujuhus (9. p.)Isichei, A. O. Vegetation. Nigerian Environmental Study/Action Team, 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.