http://e-repository.perpus.iainsalatiga.ac.id/10698
http://e-repository.perpus.iainsalatiga.ac.id/10715
http://e-repository.perpus.iainsalatiga.ac.id/10234
http://e-repository.perpus.iainsalatiga.ac.id/10339
http://e-repository.perpus.iainsalatiga.ac.id/13193