http://e-repository.perpus.iainsalatiga.ac.id/9680
http://e-repository.perpus.iainsalatiga.ac.id/9679
http://e-repository.perpus.iainsalatiga.ac.id/9102
http://e-repository.perpus.iainsalatiga.ac.id/9081
http://e-repository.perpus.iainsalatiga.ac.id/9489