http://e-repository.perpus.iainsalatiga.ac.id/17125
http://e-repository.perpus.iainsalatiga.ac.id/18276
http://e-repository.perpus.iainsalatiga.ac.id/17923
http://e-repository.perpus.iainsalatiga.ac.id/17878
http://e-repository.perpus.iainsalatiga.ac.id/17449