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