el- sayed, a. (1964). l' impot d' education propoition a conmenter. the institute of national planning.
Cita Chicago (17th ed.)el- sayed, atef. L' Impot D' Education Propoition a Conmenter. cairo: the institute of national planning, 1964.
Cita MLA (9th ed.)el- sayed, atef. L' Impot D' Education Propoition a Conmenter. the institute of national planning, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.