Symons, A. A. J.
Penguin Books, 1950
Buku Teks
Blunden, Edmund
Macmillan's Pocket Lib., 1951
Buku Teks
Muirhead, J.H., author
Allen, 1930
Buku Teks
Neale, J. E., author
Alden Press, 1950
Buku Referensi
Knowles, David, author
At University Press, 1963
Buku Teks