http://e-repository.perpus.iainsalatiga.ac.id/14512
http://e-repository.perpus.iainsalatiga.ac.id/10449
http://e-repository.perpus.iainsalatiga.ac.id/11765
http://e-repository.perpus.iainsalatiga.ac.id/11734
http://e-repository.perpus.iainsalatiga.ac.id/12079