Agger, Ben, author
Falmer Press, 1992
Buku Teks
Ward, Ian, author
Routledge. Cavendish. Taylor & Francis Group, 2004
Buku Teks
Voorhoeve, Petrus, author
Martinus Nijhoff, 1955
Buku Teks
Faculty of Law National University of Singapore, 2018
Majalah, Jurnal, Buletin
Goodrich, Peter
Macmillan, 1987
Buku Teks