Washingtoninstitute.org. Retrieved 2012-08-13. ↑ Encyclopædia Britannica Online: History of Arabia retrieved 18 January 2011 1 2 3 al-Rasheed, Madawi, A History of Saudi Arabia (Cambridge University Press, 2002) ISBN 0-521-64335-X 1 2 3 Robert Lacey, THE KINGDOM: Arabia & The House of Sa'ud, Harcourt Brace Jovanovich, Inc, 1981 (Hard Cover) and Avon Books, 1981 (Soft Cover).