http://e-repository.perpus.iainsalatiga.ac.id/15979
http://e-repository.perpus.iainsalatiga.ac.id/15985
http://e-repository.perpus.iainsalatiga.ac.id/15901
http://e-repository.perpus.iainsalatiga.ac.id/13301
http://e-repository.perpus.iainsalatiga.ac.id/13358