http://e-repository.perpus.iainsalatiga.ac.id/19970
http://e-repository.perpus.iainsalatiga.ac.id/19893
http://e-repository.perpus.iainsalatiga.ac.id/19262
http://e-repository.perpus.iainsalatiga.ac.id/18701
http://e-repository.perpus.iainsalatiga.ac.id/19595