Heard-Bey, Frauke (2005). From Trucial States to United Arab Emirates : a society in transition. London: Motivate. p. 70. ISBN1860631673. OCLC64689681.
Donald., Hawley (1970). The Trucial States. London: Allen & Unwin. p. 285. ISBN0049530054. OCLC152680.
Heard-Bey, Frauke (2005). From Trucial States to United Arab Emirates : a society in transition. London: Motivate. p. 73. ISBN1860631673. OCLC64689681.
Heard-Bey, Frauke (2005). From Trucial States to United Arab Emirates : a society in transition. London: Motivate. p. 60. ISBN1860631673. OCLC64689681.
Antelopes : global survey and regional action plans. East, R. (Rod), Mallon, David., Kingswood, Steven Charles, 1953-, International Union for Conservation of Nature and Natural Resources. Gland, Switzerland: International Union for Conservation of Nature and Natural Resources. 2001. p. 74. ISBN2880329701. OCLC29792393.{{cite book}}: CS1 maint: others (link)