el tigi, a. e. d. (1964). determining investment priority ratings. the institute of national planning.
Чикаго стиль цитування (17-те видання)el tigi, aziz el din. Determining Investment Priority Ratings. cairo: the institute of national planning, 1964.
Стиль цитування MLA (9-ме видання)el tigi, aziz el din. Determining Investment Priority Ratings. the institute of national planning, 1964.