http://e-repository.perpus.iainsalatiga.ac.id/18114
http://e-repository.perpus.iainsalatiga.ac.id/19449
http://e-repository.perpus.iainsalatiga.ac.id/18125
http://e-repository.perpus.iainsalatiga.ac.id/18308
http://e-repository.perpus.iainsalatiga.ac.id/18151