http://e-repository.perpus.iainsalatiga.ac.id/18859
http://e-repository.perpus.iainsalatiga.ac.id/19196
http://e-repository.perpus.iainsalatiga.ac.id/19179
http://e-repository.perpus.iainsalatiga.ac.id/19254
http://e-repository.perpus.iainsalatiga.ac.id/17765