http://e-repository.perpus.iainsalatiga.ac.id/11764
http://e-repository.perpus.iainsalatiga.ac.id/11662
http://e-repository.perpus.iainsalatiga.ac.id/11709
http://e-repository.perpus.iainsalatiga.ac.id/11605
http://e-repository.perpus.iainsalatiga.ac.id/8436