Hall, Jerome, author
Louisiana State University Press, 1963
Buku Klasik
Schlesinger, Rudolf B.
The Foundation Press, Inc., 1959
Buku Klasik
Jayakumar, S., author
Malaya Law Review, Faculty of Law University of Singapore, 1976
Buku Teks
Keir, D. L. (David Lindsay), author
Clarendon Press, 1967
Buku Teks
Barendt, E. M., author
Oxford University Press, 1998
Buku Teks