National Planning Institute. (2007). development of cross border trade among Nile basin countries: Ascoping study. National Planning Institute.
Chicago-referens (17:e uppl.)National Planning Institute. Development of Cross Border Trade Among Nile Basin Countries: Ascoping Study. cairo.: National Planning Institute, 2007.
MLA-referens (9:e uppl.)National Planning Institute. Development of Cross Border Trade Among Nile Basin Countries: Ascoping Study. National Planning Institute, 2007.