Hayes, Carlton J.
Macmillan, 1956
Buku Teks
Dawson, Christopher
Sheed and Ward, 1946
Buku Teks
Hulme, Edward Maslin
Century Co., 1914
Buku Teks
Wolf, Eric R., author
University of California Press, 1997
Buku Teks
Williams, E.N., author
Bodley Head, 1970
Buku Teks