Geography, D. O. (2019). Principie Of Geography Infromation System. Obafemi Awolowo University.
芝加哥风格引文Geography, Department Of. Principie Of Geography Infromation System. Obafemi Awolowo University, 2019.
MLA引文Geography, Department Of. Principie Of Geography Infromation System. Obafemi Awolowo University, 2019.
警告：这些引文格式不一定是100％准确.