Martinus Nijhoff , 1987
Buku Teks
Robertson, Arthur Henry, 1913-
Manchester University Press, 1993
Buku Teks
Council of Europe
Martinus Nijhoff Publishers, 1990
Buku Referensi
Duranti, Marco
Oxford University Press, 2017
eBooks
Dijk, P. van, editor
Kluwer Law & Taxation Publishers, 1990
Buku Teks