http://e-repository.perpus.iainsalatiga.ac.id/7778/
http://e-repository.perpus.iainsalatiga.ac.id/8124/
http://e-repository.perpus.iainsalatiga.ac.id/8343
http://e-repository.perpus.iainsalatiga.ac.id/8254
http://e-repository.perpus.iainsalatiga.ac.id/7922
http://e-repository.perpus.iainsalatiga.ac.id/18942