The international who's who 1997-98
Europa Publication Limited, 1998
Buku Referensi
The international who's who 1994-95
Europa Publication Limited, 1994
Buku Referensi
The international who's who 1992-93
Europa Publication Limited, 1994
Buku Referensi
Who's who of world religions
editor, John R. Hinnells
Macmillan, 1993
Buku Referensi
Roeder, O.G.
Who's who in Indonesian
Gunung Agung, 1980
Buku Referensi