http://e-repository.perpus.iainsalatiga.ac.id/17856
http://e-repository.perpus.iainsalatiga.ac.id/16666
http://e-repository.perpus.iainsalatiga.ac.id/19692
http://e-repository.perpus.iainsalatiga.ac.id/9841
http://e-repository.perpus.iainsalatiga.ac.id/19254