The World in figures
editorial information compiled by the Economist
The Economist Newspaper Limited, 1984
 Buku Referensi
Zeisel, Hans
Say it with figures
Harper & Row , 1968
 Buku Teks SO
Moroney, M. J.
Facts from figures
Penguin Book, 1968
 Buku Teks SO
Austria facts and figures
Austrian Federal Chancellery, 1977
 Buku Teks SO
Talos, Emmerich
Facts and figures / Emmerich Talos
Federal Press Service, 2000
 Buku Teks SO