http://e-repository.perpus.iainsalatiga.ac.id/19436
http://e-repository.perpus.iainsalatiga.ac.id/19167
http://e-repository.perpus.iainsalatiga.ac.id/19010
http://e-repository.perpus.iainsalatiga.ac.id/17916
http://e-repository.perpus.iainsalatiga.ac.id/19043