United Nations
United Nations, 1990, c1991, c1994
Buku Teks
editor in chief, C.B. Bourne
University of British Columbia Press, 1978-1982
Buku Teks
United Nations, 1989
Buku Teks
United Nations, 1987
Buku Teks
Council of Europe
Martinus Nijhoff Publishers, 1990
Buku Referensi