http://e-repository.perpus.iainsalatiga.ac.id/18385
http://e-repository.perpus.iainsalatiga.ac.id/19459
http://e-repository.perpus.iainsalatiga.ac.id/19446
http://e-repository.perpus.iainsalatiga.ac.id/19260
http://e-repository.perpus.iainsalatiga.ac.id/19262