http://e-repository.perpus.iainsalatiga.ac.id/15656
http://e-repository.perpus.iainsalatiga.ac.id/13296
http://e-repository.perpus.iainsalatiga.ac.id/13468
http://e-repository.perpus.iainsalatiga.ac.id/17421
http://e-repository.perpus.iainsalatiga.ac.id/14687