National Planning Institute. (2007). development of cross border trade among Nile basin countries: Ascoping study. National Planning Institute.
芝加哥风格引文National Planning Institute. Development of Cross Border Trade Among Nile Basin Countries: Ascoping Study. cairo.: National Planning Institute, 2007.
MLA引文National Planning Institute. Development of Cross Border Trade Among Nile Basin Countries: Ascoping Study. National Planning Institute, 2007.
警告：这些引文格式不一定是100％准确.