Não informado. (2001). Annual report on the Agricultural Department, Nigeria. Department of Agriculture.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Annual Report on the Agricultural Department, Nigeria. Lagos: Department of Agriculture, 2001.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Annual Report on the Agricultural Department, Nigeria. Department of Agriculture, 2001.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.