http://e-repository.perpus.iainsalatiga.ac.id/14277
http://e-repository.perpus.iainsalatiga.ac.id/16187
http://e-repository.perpus.iainsalatiga.ac.id/16168
http://e-repository.perpus.iainsalatiga.ac.id/16188
http://e-repository.perpus.iainsalatiga.ac.id/15935