http://e-repository.perpus.iainsalatiga.ac.id/7793/
http://e-repository.perpus.iainsalatiga.ac.id/7993/
http://e-repository.perpus.iainsalatiga.ac.id/7863/
http://e-repository.perpus.iainsalatiga.ac.id/8353
http://e-repository.perpus.iainsalatiga.ac.id/8534