http://e-repository.perpus.iainsalatiga.ac.id/19016
http://e-repository.perpus.iainsalatiga.ac.id/19145
http://e-repository.perpus.iainsalatiga.ac.id/13856
http://e-repository.perpus.iainsalatiga.ac.id/13694
http://e-repository.perpus.iainsalatiga.ac.id/15410