http://e-repository.perpus.iainsalatiga.ac.id/18828
http://e-repository.perpus.iainsalatiga.ac.id/19408
http://e-repository.perpus.iainsalatiga.ac.id/19422
http://e-repository.perpus.iainsalatiga.ac.id/18054
http://e-repository.perpus.iainsalatiga.ac.id/19135