Ewieda, M., Zakaria, S., & Farag, F. (1968). Classified Index to Articles of the Periodicals for the years 1965 and 1966. The Institute of National Planning.
Cita Chicago (17th ed.)Ewieda, Mohammed, Sohair Zakaria, i Farouk Farag. Classified Index to Articles of the Periodicals for the Years 1965 and 1966. Cairo: The Institute of National Planning, 1968.
Cita MLA (9th ed.)Ewieda, Mohammed, et al. Classified Index to Articles of the Periodicals for the Years 1965 and 1966. The Institute of National Planning, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.