http://e-repository.perpus.iainsalatiga.ac.id/11845
http://e-repository.perpus.iainsalatiga.ac.id/11825
http://e-repository.perpus.iainsalatiga.ac.id/11550
http://e-repository.perpus.iainsalatiga.ac.id/10783
http://e-repository.perpus.iainsalatiga.ac.id/9117