Tan Yew Soon, author
Singapore Times Acad. Press, 1994
Buku Teks
Ryan, N.J
Oxford University Press, 1970
Buku Teks
Teo, Yi-Ling, author
Sweet & Maxwell Asia, 2011
Buku Teks
Perry, Martin
Chichester: John Wiley & Sons, c1997
Buku Teks
Lee, Sheng-Yi, author
Singapore University Press, 1974
Buku Teks