Artikel Jurnal
Jans, Jan H., author
Europa Law Publishing, 2000
Buku Teks
Shigeta, Yasuhiro, author
Wolters Kluwer, 2010
Buku Teks
Guruswamy, Lakshman D., author
Thomson/West, 2012
Buku Teks
edited by W. Lang, H. Neuhold,K. Zemanek
Graham & Trotman / Martinus Nijhoff, 1995
Buku Referensi