http://e-repository.perpus.iainsalatiga.ac.id/12250
http://e-repository.perpus.iainsalatiga.ac.id/15976
http://e-repository.perpus.iainsalatiga.ac.id/16047
http://e-repository.perpus.iainsalatiga.ac.id/16103
http://e-repository.perpus.iainsalatiga.ac.id/15943