http://e-repository.perpus.iainsalatiga.ac.id/10373
http://e-repository.perpus.iainsalatiga.ac.id/10691
http://e-repository.perpus.iainsalatiga.ac.id/10323
http://e-repository.perpus.iainsalatiga.ac.id/10908
http://e-repository.perpus.iainsalatiga.ac.id/12604