Stevenson, Burton Egbert, author
Henry Holt, 1942
Buku Referensi
Ozturk, Umut, author
Mizan Learning Center, 2006
Buku Teks
edited by Brigadier Peter Young
Hamlyn, 1981
Buku Referensi
edited by Oscar Williams
Pocket Books, 1955
Buku Teks
Cecil, Lord David
Clarendom Press, 1951
Buku Teks