http://e-repository.perpus.iainsalatiga.ac.id/10400
http://e-repository.perpus.iainsalatiga.ac.id/10587
http://e-repository.perpus.iainsalatiga.ac.id/10373
http://e-repository.perpus.iainsalatiga.ac.id/10653
http://e-repository.perpus.iainsalatiga.ac.id/10290/