http://e-repository.perpus.iainsalatiga.ac.id/19333
http://e-repository.perpus.iainsalatiga.ac.id/19154
http://e-repository.perpus.iainsalatiga.ac.id/19089
http://e-repository.perpus.iainsalatiga.ac.id/19015
http://e-repository.perpus.iainsalatiga.ac.id/18112