http://e-repository.perpus.iainsalatiga.ac.id/19043
http://e-repository.perpus.iainsalatiga.ac.id/19213
http://e-repository.perpus.iainsalatiga.ac.id/19270
http://e-repository.perpus.iainsalatiga.ac.id/17765
http://e-repository.perpus.iainsalatiga.ac.id/19908