NIM:A01304035. bibliografi hlm. 089-090.
NIM:C03205038. Bibliografi hlm. 63-65.
In the same way as cristianity, islam poses itself as a preaching religion.A preach for the truth of islam represents Allah's order and is valued as a holy preach.The preach to obey God can be seen from different points.Seen from it's mad'u and seen from its materials.