Saud Al-Oteibi; Allen G. Noble; Frank J. Costa (February 1993). "The Impact of Planning on Growth and Development in Riyadh, Saudi Arabia, 1970-1990". GeoJournal. 29 (2): 163. Bibcode:1993GeoJo..29..163A. doi:10.1007/BF00812813.
Saud Al-Oteibi; Allen G. Noble; Frank J. Costa (February 1993). "The Impact of Planning on Growth and Development in Riyadh, Saudi Arabia, 1970-1990". GeoJournal. 29 (2): 163. Bibcode:1993GeoJo..29..163A. doi:10.1007/BF00812813.