http://e-repository.perpus.iainsalatiga.ac.id/18189
http://e-repository.perpus.iainsalatiga.ac.id/18880
http://e-repository.perpus.iainsalatiga.ac.id/18493
http://e-repository.perpus.iainsalatiga.ac.id/17922
http://e-repository.perpus.iainsalatiga.ac.id/18182