Whitaker, Joseph
An almanack for the year of our Lord 1987
J. Whitaker and Sons, 1987
 Buku Referensi
The Education authorities directory and annual 1987
School Government Publishing Co., 1987
 Buku Referensi
The Education authorities directory and annual 1989
School Government Publishing Co., [Date of publication not identified]
 Buku Referensi
Almanak
 Buku Referensi
Directory of research in academic year 1996-97
National University of Singapore, [Date of publication not identified]
 Buku Referensi