Whitaker's almanack 1991
J. Whitaker and Sons, 1990
 Buku Referensi
The aviation & aerospace almanac 1997
executive editor Richard Lampl
Aviation Week Group, 1997
 Buku Referensi
Concise Oxford English dictionary
edited by Catherine Soanes and Angus Stevenson
Oxford University Press, 2006
 Buku Referensi
Kepek petangan almenak Djawi : Selami laminipun lan almenak Masehi 100 tahun : th. 1953 ngantos th. 2052
Marfiah, 1952
 Buku Teks
The World almanac and book of facts 1983
Newspaper Enterprise Association, 1982
 Buku Referensi
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