el tigi, a. e. d. (1964). determining investment priority ratings. the institute of national planning.
Chicago Style (17th ed.) Zitazioael tigi, aziz el din. Determining Investment Priority Ratings. cairo: the institute of national planning, 1964.
MLA (9th ed.) Zitazioael tigi, aziz el din. Determining Investment Priority Ratings. the institute of national planning, 1964.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.