http://e-repository.perpus.iainsalatiga.ac.id/9800
http://e-repository.perpus.iainsalatiga.ac.id/10094
http://e-repository.perpus.iainsalatiga.ac.id/9887
http://e-repository.perpus.iainsalatiga.ac.id/8283
http://e-repository.perpus.iainsalatiga.ac.id/9109