http://e-repository.perpus.iainsalatiga.ac.id/12540
http://e-repository.perpus.iainsalatiga.ac.id/12730
http://e-repository.perpus.iainsalatiga.ac.id/12734
http://e-repository.perpus.iainsalatiga.ac.id/12839
http://e-repository.perpus.iainsalatiga.ac.id/13296