http://e-repository.perpus.iainsalatiga.ac.id/15972
http://e-repository.perpus.iainsalatiga.ac.id/16209
http://e-repository.perpus.iainsalatiga.ac.id/16154
http://e-repository.perpus.iainsalatiga.ac.id/16230
http://e-repository.perpus.iainsalatiga.ac.id/14559