Loomis, C. Grant
The Mediaeval Academy of America, 1948
Buku Teks
Kingsland, William, author
George Allen and Unwin, 1954
Buku Teks
Beasley, Norman
Buell, Sloan and Pearce, 1952
Buku Teks
Cannell, Fenella
Ateneo de Manila University Press, 1999
Buku Teks
Cecil, Lord David
Clarendom Press, 1951
Buku Teks