Posener, Julius
MIT Pres, 1992
Buku Teks
Price, Lawrence Marsden
University of California Press, 1942
Buku Teks
Moscow Foreign Languages Publishing House 1959
Buku Teks
Longman, green & Co, 1950
Buku Teks
Cecil, Lord David
Clarendom Press, 1951
Buku Teks