http://e-repository.perpus.iainsalatiga.ac.id/18945
http://e-repository.perpus.iainsalatiga.ac.id/18507
http://e-repository.perpus.iainsalatiga.ac.id/19189
http://e-repository.perpus.iainsalatiga.ac.id/19459
http://e-repository.perpus.iainsalatiga.ac.id/19169