Akester, Patricia, author
Sweet & Maxwell, 2008
Buku Referensi
Brent, Nancy J., author
W.B. Saunders, 2001
Buku Teks
Edwards, Martin B., author
Kogan Page, 1991
Buku Teks
Cunningham, James P., author
Kogan Page, 1973
Buku Teks
Ritter, Lennart, author
Kluwer Law International, 1991
Buku Teks