Directory of research in academic year 1996-97
National University of Singapore, [date of publication not identified]
 Buku Referensi
Directory of research in academic year 1995-96
National University of Singapore, [date of publication not identified]
 Buku Referensi
Directory of special libraries and information centers 1991 : volume 1 part 1 A-N
Gale Research, 1991
 Buku Referensi
Directory of special libraries and information centers 1991 : volume 1 part 2 O-Z
Gale Research, 1991
 Buku Referensi
A world directory of criminological institutes / UNSDRI, United Nations Social Defence Research Institute.
Institute, 1974
 Buku Teks