http://e-repository.perpus.iainsalatiga.ac.id/10740
http://e-repository.perpus.iainsalatiga.ac.id/11877
http://e-repository.perpus.iainsalatiga.ac.id/15587
http://e-repository.perpus.iainsalatiga.ac.id/15643
http://e-repository.perpus.iainsalatiga.ac.id/16167