http://e-repository.perpus.iainsalatiga.ac.id/16110
http://e-repository.perpus.iainsalatiga.ac.id/16168
http://e-repository.perpus.iainsalatiga.ac.id/16196
http://e-repository.perpus.iainsalatiga.ac.id/13856
http://e-repository.perpus.iainsalatiga.ac.id/15654