Lloyd, Dennis
Penguin Books, 1976
Buku Teks
Cardozo, Benjamin N., author
Yale University Press, 1954
Buku Teks
edited by R.M. Dworkin
Oxford University Press, 1977
Buku Teks
edited by R.M. Dworkin
Oxford University Press, 1990
Buku Teks
Pound, Roscoe, author
Rensen M. Kinne III, 1982
Buku Teks