http://e-repository.perpus.iainsalatiga.ac.id/11914
http://e-repository.perpus.iainsalatiga.ac.id/17475
http://e-repository.perpus.iainsalatiga.ac.id/17456
http://e-repository.perpus.iainsalatiga.ac.id/17381
http://e-repository.perpus.iainsalatiga.ac.id/13010