Kemenade, Willem Van, author
Alfred A. Knopf, 1997
Buku Teks
Reiber, Beth, author
Prentice-Hall, 1986
Buku Teks
So, M.L.
Heavenly People Depot, [, 1995]
Buku Teks
Patten, Chris
Macmillan, 1998
Buku Teks
Tan, Chwee Huat, author
Saw Centre Financial Studies, NUS Business School, 2007
Buku Teks