Sources:
- Laila Nehme, Ancient Hegra, a Nabataean Site in a Semi-arid Environment. The Urban Space and Preliminary Results from the First Excavation Season, XVII International Congress of Classical Archaeolog y, Roma 22-26 Sept. 2008 Session : Formation d’une culture urbaine aux marges du dés ert syro-arabique: espaces urbains et périurbains Bollettino di Archeologia on line I 2010/ Volume speciale G / G5 / 3 - https://pdfcoffee.com/3nehmepdf-pdf-free.html
- https://madainproject.com/madain_saleh
