Drew, Philip
Law Book Company Limited, 1985
Buku Referensi
Wakita, Osamu A.
John Wiley & Sons, 1977
Buku Teks
Guttridge, Bryan
John Wiley & Sons, 1973
Buku Teks
edited by William J. Cavanaugh and Joseph A. Wilkes
John Wiley & Sons, 1999
Buku Teks
Wakita, Osamu A.
John Wiley & Sons, 1994
Buku Teks