http://e-repository.perpus.iainsalatiga.ac.id/19629
http://e-repository.perpus.iainsalatiga.ac.id/20050
http://e-repository.perpus.iainsalatiga.ac.id/20111
http://e-repository.perpus.iainsalatiga.ac.id/19368
http://e-repository.perpus.iainsalatiga.ac.id/19892