Woodford, A.O.
W.H. Freeman, 1965
Buku Teks
Tianjin Ancient Articles Publishing House, 2009
eBooks
Fisher, Janet
Scolar Press, 1994
Buku Referensi
Lehmann, Winfred P.
Holt, Rinehart and Winston, 1962
Buku Teks SO
East, W. Gordon
E.P. Dutton, 1950
Buku Teks SO