http://e-repository.perpus.iainsalatiga.ac.id/18643
http://e-repository.perpus.iainsalatiga.ac.id/18705
http://e-repository.perpus.iainsalatiga.ac.id/19120
http://e-repository.perpus.iainsalatiga.ac.id/19469
http://e-repository.perpus.iainsalatiga.ac.id/20065