Levy, Claudine
Clarendon Press, 1991
Buku Teks
Kahn-Freund, Otto, 1900-1979
Clarendon Press, 1991
Buku Teks
Wade, H.W.R.
Clarendon Press, 1971
Buku Teks
Schwartz, Bernard
Little, Brown & Co., 1991
Buku Teks
Wade, H.W.R.
Claredon Press, 1994
Buku Teks