http://e-repository.perpus.iainsalatiga.ac.id/18256
http://e-repository.perpus.iainsalatiga.ac.id/18382
http://e-repository.perpus.iainsalatiga.ac.id/18412
http://e-repository.perpus.iainsalatiga.ac.id/18162
http://e-repository.perpus.iainsalatiga.ac.id/18374