Hudson, W.H.
Dood, Mead and Company, 1949
Buku Teks
Griffith University,
Majalah, Jurnal, Buletin
Marshall Cavendish Academic, 2004
Buku Teks
Marshall Cavendish Academic, 2004
Buku Teks
Tang, Xianzu
Foreign Teaching and Research Press, 2003
Buku Teks