http://e-repository.perpus.iainsalatiga.ac.id/11610
http://e-repository.perpus.iainsalatiga.ac.id/13135
http://e-repository.perpus.iainsalatiga.ac.id/13719
http://e-repository.perpus.iainsalatiga.ac.id/13790
http://e-repository.perpus.iainsalatiga.ac.id/17390