http://e-repository.perpus.iainsalatiga.ac.id/9378
http://e-repository.perpus.iainsalatiga.ac.id/9728
http://e-repository.perpus.iainsalatiga.ac.id/19516
http://e-repository.perpus.iainsalatiga.ac.id/18468
http://e-repository.perpus.iainsalatiga.ac.id/19453