http://e-repository.perpus.iainsalatiga.ac.id/11403
http://e-repository.perpus.iainsalatiga.ac.id/11620
http://e-repository.perpus.iainsalatiga.ac.id/12008
http://e-repository.perpus.iainsalatiga.ac.id/12359
http://e-repository.perpus.iainsalatiga.ac.id/12988