http://e-repository.perpus.iainsalatiga.ac.id/9339
http://e-repository.perpus.iainsalatiga.ac.id/10450
http://e-repository.perpus.iainsalatiga.ac.id/10288
http://e-repository.perpus.iainsalatiga.ac.id/10167
http://e-repository.perpus.iainsalatiga.ac.id/12182