De Blij, Harm J., author
John Wiley & Sons, 1993
Buku Teks
Penna, Anthony N, author
Blackwell, 2013
Buku Teks
edited by John Parham, Louise Westling
Cambridge University Press, 2017
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1996
Buku Referensi
Kluwer Law International, 1996
Buku Teks