http://e-repository.perpus.iainsalatiga.ac.id/11680
http://e-repository.perpus.iainsalatiga.ac.id/12538
http://e-repository.perpus.iainsalatiga.ac.id/12532
http://e-repository.perpus.iainsalatiga.ac.id/11208
http://e-repository.perpus.iainsalatiga.ac.id/13316