http://e-repository.perpus.iainsalatiga.ac.id/17539
http://e-repository.perpus.iainsalatiga.ac.id/17565
http://e-repository.perpus.iainsalatiga.ac.id/17554
http://e-repository.perpus.iainsalatiga.ac.id/17831
http://e-repository.perpus.iainsalatiga.ac.id/15899