Holt, Stephen, author
Hamish Hamilton, 1967
Buku Teks
Schwartz, Bernard, author
New York University Press, 1956
Buku Teks
Llewellyn, Karl N.
Little,Brown and Company, 1960
Buku Teks
Latham, R.T.E.
Oxford University Press, 1949
Buku Teks
Holmes, Oliver Wendell
Little, Brown & Co., 1963
Buku Teks