The international who's who 1984-85
Europe Publications Limited, 1984
 Buku Referensi
The international who's who, 2008.
Routledge, 2007
 Buku Teks
The international who's who 1987-88
Europa Publication Limited, 1988
 Buku Referensi
The international who's who 2008
Routledge, Taylor & Francis Group, 2007
 Buku Referensi
The international who's who 1997-98
Europa Publication Limited, 1998
 Buku Referensi
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