http://e-repository.perpus.iainsalatiga.ac.id/20065
http://e-repository.perpus.iainsalatiga.ac.id/20387
http://e-repository.perpus.iainsalatiga.ac.id/20090
http://e-repository.perpus.iainsalatiga.ac.id/19938
http://e-repository.perpus.iainsalatiga.ac.id/19643