Aṣ- Ṣila baina t-taṣauwuf wa-t-tašaiyuʿ (Risāla ǧāmiʿīya) - Šaibī, Kāmil Muṣṭafā aš- 1927-2006 (Maṭbaʿat az-Zahrāʾ, 1963)