Rofail, S. (1967). Methodology & Summary. The Institute of National Planning.
Dyfyniad Arddull ChicagoRofail, Salib. Methodology & Summary. Cairo: The Institute of National Planning, 1967.
Dyfyniad MLARofail, Salib. Methodology & Summary. The Institute of National Planning, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.