Geography, D. o. (2019). Introduction to Economics Geograpy. Obafemi Awolowo University.
芝加哥风格引文Geography, Department of. Introduction to Economics Geograpy. Obafemi Awolowo University, 2019.
MLA引文Geography, Department of. Introduction to Economics Geograpy. Obafemi Awolowo University, 2019.
警告：这些引文格式不一定是100％准确.