http://e-repository.perpus.iainsalatiga.ac.id/17016
http://e-repository.perpus.iainsalatiga.ac.id/17603
http://e-repository.perpus.iainsalatiga.ac.id/17558
http://e-repository.perpus.iainsalatiga.ac.id/17748
http://e-repository.perpus.iainsalatiga.ac.id/18475