Directories in print 1991 : part 2
Gale Research, 1991
Buku Referensi
Directories in print 1991 : part 1
Gale Research, 1991
Buku Referensi
Direktori Peacebuilding Indonesia (Indonesian Peacebuilding Directory)
Cordaid-CRS, 2003
Buku Referensi
Directory of research in academic year 1995-96
National University of Singapore, [date of publication not identified]
Buku Referensi
Ulrich's international periodicals directory 1991-1992 : volume 2
R.R. Bowker, 1991
Buku Referensi