http://e-repository.perpus.iainsalatiga.ac.id/16273
http://e-repository.perpus.iainsalatiga.ac.id/16167
http://e-repository.perpus.iainsalatiga.ac.id/16137
http://e-repository.perpus.iainsalatiga.ac.id/13437
http://e-repository.perpus.iainsalatiga.ac.id/17359