http://e-repository.perpus.iainsalatiga.ac.id/10649
http://e-repository.perpus.iainsalatiga.ac.id/10656
http://e-repository.perpus.iainsalatiga.ac.id/10381
http://e-repository.perpus.iainsalatiga.ac.id/12539
http://e-repository.perpus.iainsalatiga.ac.id/12910