http://e-repository.perpus.iainsalatiga.ac.id/11629
http://e-repository.perpus.iainsalatiga.ac.id/13250
http://e-repository.perpus.iainsalatiga.ac.id/13222
http://e-repository.perpus.iainsalatiga.ac.id/12216
http://e-repository.perpus.iainsalatiga.ac.id/13267