Five new heritage sites in Africa. BBC (July 13, 2006). ციტატა: „Harar Jugol, seen as the fourth holiest city of Islam, includes 82 mosques, three of which date from the 10th Century, and 102 shrines.“ ციტირების თარიღი: 2006-12-18.
Harar Jugol, the Fortified Historic Town English (HTML). World Heritage List. UNESCO World Heritage Centre. ციტატა: „It is considered 'the fourth holy city' of Islam, having been founded by a holy missionary from the Arabic Peninsula.“ ციტირების თარიღი: 6 August 2009.
