http://e-repository.perpus.iainsalatiga.ac.id/10367
http://e-repository.perpus.iainsalatiga.ac.id/10370
http://e-repository.perpus.iainsalatiga.ac.id/10453
http://e-repository.perpus.iainsalatiga.ac.id/10559
http://e-repository.perpus.iainsalatiga.ac.id/8102