http://e-repository.perpus.iainsalatiga.ac.id/19467
http://e-repository.perpus.iainsalatiga.ac.id/19173
http://e-repository.perpus.iainsalatiga.ac.id/18144
http://e-repository.perpus.iainsalatiga.ac.id/19053
http://e-repository.perpus.iainsalatiga.ac.id/19446