Post, Gordon C.
The Liberal Arts Press, 1957
Buku Teks
Schwartz, Bernard, author
Clarendon Press Oxford, 1972
Buku Teks
Oliver, Dawn, author
Pinter, A Cassell Imprint, 1996
Buku Teks
Lovell, Colin Rhys
Oxford University Press, 1962
Buku Teks
Harris, Phil, author
Weidenfeld and Nicolson, 1993
Buku Teks