Haar, Charles M., author
Little, Brown, 1977
Buku Teks
Cunningham, Roger A., author
West Pub., 1993
Buku Teks
Smith, Roger J., author
Longman, 2000
Buku Teks
Alexander, Gregory S., 1965-, author
Cambridge University Press, 2012
Buku Teks
Bradbrook, Adrian J., author
The Law Book Company Limited, 1991
Buku Teks