Whitaker's concise almanack 1994
J. Whitaker and Sons, 1994
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Whitaker's almanack 1991
J. Whitaker and Sons, 1990
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Whitaker, Joseph
An almanack for the year of our Lord 1987
J. Whitaker and Sons, 1987
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Whitaker`s almanack 1994
J. Whitaker & Sons, 1994
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Fochler-Hauke, Gustav
Der Fischer weltalmanach zahlen daten fakten 1994
Fischer Taschenbuch Verlag, 1993
 Buku Referensi