http://e-repository.perpus.iainsalatiga.ac.id/17676
http://e-repository.perpus.iainsalatiga.ac.id/13050
http://e-repository.perpus.iainsalatiga.ac.id/13200
http://e-repository.perpus.iainsalatiga.ac.id/16211
http://e-repository.perpus.iainsalatiga.ac.id/16292