http://e-repository.perpus.iainsalatiga.ac.id/10437
http://e-repository.perpus.iainsalatiga.ac.id/9653
http://e-repository.perpus.iainsalatiga.ac.id/9459
http://e-repository.perpus.iainsalatiga.ac.id/9273
http://e-repository.perpus.iainsalatiga.ac.id/7960