Lipton, Phillip, author
LBC Information Sevices, 1996
Buku Teks
Lipton, Phillip, author
The Law Book Company Limited, 1995
Buku Teks
Hogan, John D., author
Harper & Brothers, 1956
Buku Teks
Cirad, 1999
Buku Teks
O`Dowd, Bernard, author
Angust & Robertson, 1963
Buku Teks