Martinus Nijhoff , 1987
Buku Teks
Robertson, A.H.
Manchester 1993, Manchester University Press
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