Hudson, Alastair
Sweet and Maxwell, 2008
Buku Teks
Paulus P. Rahardjo, editor
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
edited by Karl-Eduard von der Heydt and Stanley Keller
Graham & Trotman, 1995
Buku Teks