Whitaker, Joseph
An almanack for the year of our Lord 1987
J. Whitaker and Sons, 1987
 Buku Referensi
Whitaker's almanack 1994
J. Whitaker and Sons , 1993
 Buku Referensi
The World almanac and book of facts 1983
Newspaper Enterprise Association, 1982
 Buku Referensi
The World almanac and book of facts 1988
Newspaper Enterprise Association, 1987
 Buku Referensi
The World almanac and book of facts 1986
Newspaper Enterprise Association, 1985
 Buku Referensi