Paradise, T. R. (2005). Petra revisited: An examination of sandstone weathering research in Petra, Jordan in Special Paper 390: Stone Decay in the Architectural Environment. Vol. 390. p. 39. doi:10.1130/0-8137-2390-6.39. ISBN0-8137-2390-6.
"Park Visitor Data". Parks and Wildlife Service of the Northern Territory. 2013. Archived from the original on 4 January 2014. Retrieved 29 January 2014.
"Park Visitor Data". Parks and Wildlife Service of the Northern Territory. 2013. Archived from the original on 4 January 2014. Retrieved 29 January 2014.