el koussy, a. (1964). preconditions for educational planning. the institute of national planning.
Citazione stile Chigago Style (17a edizione)el koussy, a.a. Preconditions for Educational Planning. cairo: the institute of national planning, 1964.
Citatione MLA (9a ed.)el koussy, a.a. Preconditions for Educational Planning. the institute of national planning, 1964.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.