Ham, Anthony; Shams, Martha Brekhus; Madden, Andrew (15 September 2004). Saudi Arabia. Lonely Planet. p. 129. ISBN978-1-74059-667-1. Retrieved 27 August 2012.
"Klimatafel von Abha / Saudi-Arabien"(PDF). Baseline climate means (1961-1990) from stations all over the world (in German). Deutscher Wetterdienst. Retrieved January 26, 2016.