http://e-repository.perpus.iainsalatiga.ac.id/10510
http://e-repository.perpus.iainsalatiga.ac.id/10638
http://e-repository.perpus.iainsalatiga.ac.id/10228
http://e-repository.perpus.iainsalatiga.ac.id/8102
http://e-repository.perpus.iainsalatiga.ac.id/10821