http://e-repository.perpus.iainsalatiga.ac.id/16116
http://e-repository.perpus.iainsalatiga.ac.id/17452
http://e-repository.perpus.iainsalatiga.ac.id/17286
http://e-repository.perpus.iainsalatiga.ac.id/17385
http://e-repository.perpus.iainsalatiga.ac.id/17663