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↑Lal, Brij V.; Fortune, Kate (2000), The Pacific Islands: An Encyclopedia, vol. 1, University of Hawaii Press, p. 582, ISBN9780824822651.
↑Weightman, Barbara A. (2011), Dragons and Tigers: A Geography of South, East, and Southeast Asia (3 ed.), John Wiley & Sons, p. 266, ISBN9780470876282.
↑Ridgell, Reilly (1995), Pacific Nations and Territories: the Islands of Micronesia, Melanesia, and Polynesia (3 ed.), Bess Press, p. 79, ISBN1573060062.
↑Oxford Business Group (2007), The Report: Emerging Saudi Arabia 2007, Oxford Business Group, p. 114, ISBN9781902339665((citation)): |author= has generic name (help) ("The Kingdom has no rivers, lakes or any permanent body of standing water...").