http://e-repository.perpus.iainsalatiga.ac.id/11607
http://e-repository.perpus.iainsalatiga.ac.id/17410
http://e-repository.perpus.iainsalatiga.ac.id/17582
http://e-repository.perpus.iainsalatiga.ac.id/13048
http://e-repository.perpus.iainsalatiga.ac.id/17614