Não informado. (2001). Annual report on the Agricultural Department, Nigeria. Department of Agriculture.
Citação do estilo Chicago (17ª ed.)Não informado. Annual Report on the Agricultural Department, Nigeria. Lagos: Department of Agriculture, 2001.
Citação MLA (8ª ed.)Não informado. Annual Report on the Agricultural Department, Nigeria. Department of Agriculture, 2001.
警告：这些引文格式不一定是100％准确.