http://e-repository.perpus.iainsalatiga.ac.id/18243
http://e-repository.perpus.iainsalatiga.ac.id/19095
http://e-repository.perpus.iainsalatiga.ac.id/19097
http://e-repository.perpus.iainsalatiga.ac.id/20063
http://e-repository.perpus.iainsalatiga.ac.id/19903