http://e-repository.perpus.iainsalatiga.ac.id/18835
http://e-repository.perpus.iainsalatiga.ac.id/19257
http://e-repository.perpus.iainsalatiga.ac.id/19182
http://e-repository.perpus.iainsalatiga.ac.id/18354
http://e-repository.perpus.iainsalatiga.ac.id/19134