Okeke, A. P. (2019). Profit efficiency of sweet potato production in Kwara State, Nigeria. Obafemi Awolowo University.
芝加哥风格引文Okeke, Amaka Patience. Profit Efficiency of Sweet Potato Production in Kwara State, Nigeria. Obafemi Awolowo University, 2019.
MLA引文Okeke, Amaka Patience. Profit Efficiency of Sweet Potato Production in Kwara State, Nigeria. Obafemi Awolowo University, 2019.
警告：这些引文格式不一定是100％准确.