Abd Al-Qadir Al-Jilani his contributions to the methodological studies of Islamic Da'wah (mission) - Abdullah Muhammad Zin (Bangi : Perpustakaan Tun Seri Lanang, 1990)
Also available in print form
Thesis (Ph.D.) - University of Kent at Canterbury, 1990
Keywords: 'Abd al-Qadir al-Jilani, -- d. 1166