http://e-repository.perpus.iainsalatiga.ac.id/19013
http://e-repository.perpus.iainsalatiga.ac.id/19043
http://e-repository.perpus.iainsalatiga.ac.id/19033
http://e-repository.perpus.iainsalatiga.ac.id/17765
http://e-repository.perpus.iainsalatiga.ac.id/19479