Rofail, S. (1967). Methodology & Summary. The Institute of National Planning.
Chicago-čujuhus (17. p.)Rofail, Salib. Methodology & Summary. Cairo: The Institute of National Planning, 1967.
MLA-čujuhus (9. p.)Rofail, Salib. Methodology & Summary. The Institute of National Planning, 1967.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.