http://e-repository.perpus.iainsalatiga.ac.id/19487
http://e-repository.perpus.iainsalatiga.ac.id/18012
http://e-repository.perpus.iainsalatiga.ac.id/18252
http://e-repository.perpus.iainsalatiga.ac.id/18191
http://e-repository.perpus.iainsalatiga.ac.id/18279