James Winston Morris, „An Arab Machiavelli? Rhetoric, Philosophy and Politics in Ibn Khaldun’s Critique of Sufism“, Harvard Middle Eastern and Islamic Review 8 (2009), pp 242 – 291. [1]Архив на оригинала от 2010-06-20 в Wayback Machine.
James Winston Morris, „An Arab Machiavelli? Rhetoric, Philosophy and Politics in Ibn Khaldun’s Critique of Sufism“, Harvard Middle Eastern and Islamic Review 8 (2009), pp 242 – 291. [1]Архив на оригинала от 2010-06-20 в Wayback Machine.