Jarrow, Robert
South-Western College, 2000
Buku Teks
Hudson, Alastair
Sweet and Maxwell, 2008
Buku Teks
Thomas, R.L.
Kluwer law and taxation Publisher, 1986
Buku Teks
Ratner, David L.
West Publishing, 1992
Buku Teks
edited by Karl-Eduard von der Heydt and Stanley Keller
Graham & Trotman, 1995
Buku Teks