http://e-repository.perpus.iainsalatiga.ac.id/16501
http://e-repository.perpus.iainsalatiga.ac.id/16289
http://e-repository.perpus.iainsalatiga.ac.id/15950
http://e-repository.perpus.iainsalatiga.ac.id/15979
http://e-repository.perpus.iainsalatiga.ac.id/11738