Text this: معالم الجماعة الدعوية الفعالةفي ضوء أحوال العمران البشري وسننه عند ابن خلدون = ma'alim al-jama'at al-da'awiyyah al-fa'alah fi du'i ahwal al-umran al-basyar wa sunanuhu 'inda ibn khaldun (Indicators of efficient missionary community in light of the conditions and laws of human civilization according to Ibn Khaldun / Penunjuk kumpulan da'wah efekttif berdasarkan ehwal dan tata tamadun manusia menurut Ibn Khaldun)