http://e-repository.perpus.iainsalatiga.ac.id/9108
http://e-repository.perpus.iainsalatiga.ac.id/9318
http://e-repository.perpus.iainsalatiga.ac.id/9321
http://e-repository.perpus.iainsalatiga.ac.id/6336
http://e-repository.perpus.iainsalatiga.ac.id/9148
c 1.2.3.4 olah