http://e-repository.perpus.iainsalatiga.ac.id/16182
http://e-repository.perpus.iainsalatiga.ac.id/16381
http://e-repository.perpus.iainsalatiga.ac.id/16288
http://e-repository.perpus.iainsalatiga.ac.id/16304
http://e-repository.perpus.iainsalatiga.ac.id/16055