http://e-repository.perpus.iainsalatiga.ac.id/11280
http://e-repository.perpus.iainsalatiga.ac.id/11268
http://e-repository.perpus.iainsalatiga.ac.id/10861
http://e-repository.perpus.iainsalatiga.ac.id/11456
http://e-repository.perpus.iainsalatiga.ac.id/10883