http://e-repository.perpus.iainsalatiga.ac.id/11076
http://e-repository.perpus.iainsalatiga.ac.id/11337
http://e-repository.perpus.iainsalatiga.ac.id/11369
http://e-repository.perpus.iainsalatiga.ac.id/10728
http://e-repository.perpus.iainsalatiga.ac.id/11322