Poh Chu Chai
Longman, 199
Buku Teks
Friedman, Lawrence M., 1930-, author
W.W. Norton, 1984
Buku Teks
Arbetmen, Lee P., author
West Publishing, 1990
Buku Teks
Ross, Martin J., author
A Fawcett Crest Book, 1975
Buku Teks
Publications International, 1990
Buku Teks