Fochler-Hauke, Gustav
Der Fischer weltalmanach zahlen daten fakten 1994
Fischer Taschenbuch Verlag, 1993
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The aviation & aerospace almanac 1997
executive editor Richard Lampl
Aviation Week Group, 1997
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The Americana Annual 1986
edited by Jeffrey H. Hacker
Canada Grolier, 1986
 Buku Teks SO
The New York times 2004 almanac
edited by John W. Wrigth
Penguin Group, 2003
 Buku Referensi
The World almanac and book of facts 1988
Newspaper Enterprise Association, 1987
 Buku Referensi