http://e-repository.perpus.iainsalatiga.ac.id/19487
http://e-repository.perpus.iainsalatiga.ac.id/19420
http://e-repository.perpus.iainsalatiga.ac.id/18971
http://e-repository.perpus.iainsalatiga.ac.id/20111
http://e-repository.perpus.iainsalatiga.ac.id/19939