edited by Nigel G. Foster
Blackstone Press Limited, 1990
Buku Referensi
edited by. Nigel G. Foster
Nigel G.Foster, 1998,
Buku Referensi
Lang, Michael, author
Kluwer Law International, 2007
Buku Teks
Fine, Frank L, author
Sweet & Maxwell, 2006
Buku Teks
McAllister, Richard, author
Routledge, 1997
Buku Teks