Robertson, Arthur Henry, 1913-
Manchester University Press, 1992
Buku Teks
Carey, John
Oceana Publications, Inc, 1968
Buku Teks
Bossuyt, Marc
Intersentia, 2016
eBooks
Jurnal Kajian Wilayah Eropa Vol. 4 No. 3 2008: 91-106, 2008
Artikel Jurnal
edited by SNU Asia-Pacific Law Institute
Constitutional Court of Korea, 2016
Buku Teks