Giuseppe De Palo, Mary B. Trevor, editor
Kluwer Law International, 2007
Buku Teks
International Bank for Reconstruction and Development
World Bank, 1994
Buku Teks
Evans, Gareth
Melbourne Univer, 1991
Buku Teks
edited by Patrick Troy
Cambridge University Press, 1995
Buku Teks
Babbage, Ross
Allen and Unwin, 1990
Buku Teks