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
The international who's who 1997-98
Europa Publication Limited, 1998
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