Stallybrass, W.T.S.
Sweet & Maxwell Limited, 1936
Buku Teks
Pryles, Michael
Butterworth, 1974
Buku Teks
Martin, James A., author
Little, Brown, 1978
Buku Teks
Schwartz, Bernard, author
New York University Press, 1956
Buku Teks
Llewellyn, Karl N.
Little,Brown and Company, 1960
Buku Teks