Roeder, O.G.
Who's who in Indonesian
Gunung Agung, 1971
Buku Referensi
Who's who in health care
Hanover Pub.,, 1981
Buku Referensi
The international who's who 1997-98
Europa Publication Limited, 1998
Buku Referensi
The international who's who 1987-88
Europa Publication Limited, 1988
Buku Referensi
The international who's who 1994-95
Europa Publication Limited, 1994
Buku Referensi