http://e-repository.perpus.iainsalatiga.ac.id/9578
http://e-repository.perpus.iainsalatiga.ac.id/9603
http://e-repository.perpus.iainsalatiga.ac.id/10117
http://e-repository.perpus.iainsalatiga.ac.id/9878
http://e-repository.perpus.iainsalatiga.ac.id/10124