http://e-repository.perpus.iainsalatiga.ac.id/18349
http://e-repository.perpus.iainsalatiga.ac.id/18620
http://e-repository.perpus.iainsalatiga.ac.id/18139
http://e-repository.perpus.iainsalatiga.ac.id/19053
http://e-repository.perpus.iainsalatiga.ac.id/19169