Hart, James D.
Oxford University Press, 1986
Buku Referensi
Doseo Chulphan Asia, 2006
Buku Referensi
Oxford University Press, 1942
Buku Referensi
editor, Stuart Sim
Prentice-Hall, 1995
Buku Referensi
edited by Joseph T. Shipley
Writer Publisher, 1979
Buku Referensi