http://e-repository.perpus.iainsalatiga.ac.id/18701
http://e-repository.perpus.iainsalatiga.ac.id/1794611
http://e-repository.perpus.iainsalatiga.ac.id/17716
http://e-repository.perpus.iainsalatiga.ac.id/13069
http://e-repository.perpus.iainsalatiga.ac.id/11838