Jackson, Paul, author
Sweet & Maxwell, 1973
Buku Teks
Marshall, H.H.
Sweet & Maxwell Limited, 1959
Buku Teks
Weinreb, Lloyd L.
Harvard University Press, 1987
Buku Teks
Manchester Manchester University Press 1995,
Buku Teks
Hachenburger, Petra
Routledge, 2000
Buku Referensi