http://e-repository.perpus.iainsalatiga.ac.id/18110
http://e-repository.perpus.iainsalatiga.ac.id/18349
http://e-repository.perpus.iainsalatiga.ac.id/19271
http://e-repository.perpus.iainsalatiga.ac.id/18895
http://e-repository.perpus.iainsalatiga.ac.id/19624