http://e-repository.perpus.iainsalatiga.ac.id/19125
http://e-repository.perpus.iainsalatiga.ac.id/19178
http://e-repository.perpus.iainsalatiga.ac.id/19028
http://e-repository.perpus.iainsalatiga.ac.id/19057
http://e-repository.perpus.iainsalatiga.ac.id/19459