http://e-repository.perpus.iainsalatiga.ac.id/8834
http://e-repository.perpus.iainsalatiga.ac.id/8705
http://e-repository.perpus.iainsalatiga.ac.id/8406
http://e-repository.perpus.iainsalatiga.ac.id/8822
http://e-repository.perpus.iainsalatiga.ac.id/9420