Tham khảo Tiểu_vương_quốc_Nejd_và_Hasa

  1. ↑ J. A. Hammerton. Peoples Of All Nations: Their Life Today And Story Of Their Past (in 14 Volumes). Concept Publishing Company, 2007. Pp. 193.
  2. 1 2 3 Madawi Al-Rasheed. A History of Saudi Arabia. Cambridge, England, UK: Cambridge University Press, 2002. Pp. 40.