Hall, Alvin D., author
Prentice-Hall, 1990
Buku Teks
Hudson, Alastair, author
Sweet and Maxwell, 2008
Buku Teks
Smith
West Publishing Company, 1982
Buku Teks
Krever, Richard.
Butterworth, 1986
Buku Teks
editoed by Karl-Eduard von der Heydt, Stanley Keller
Graham & Trotman / Martinus Nijhoff, 1995
Buku Referensi