http://e-repository.perpus.iainsalatiga.ac.id/13263
http://e-repository.perpus.iainsalatiga.ac.id/14247
http://e-repository.perpus.iainsalatiga.ac.id/14734
http://e-repository.perpus.iainsalatiga.ac.id/19153
http://e-repository.perpus.iainsalatiga.ac.id/14646