http://e-repository.perpus.iainsalatiga.ac.id/12515
http://e-repository.perpus.iainsalatiga.ac.id/11950
http://e-repository.perpus.iainsalatiga.ac.id/11497
http://e-repository.perpus.iainsalatiga.ac.id/12006
http://e-repository.perpus.iainsalatiga.ac.id/12035