Pevehouse, Jon C., author
New York, 2005
Buku Teks
Walsh, Maurice
W & R Chambers, 1945
Buku Teks
Tan, Chong Koay, author
Kenace, 2015
Buku Teks
Wee, Heng Neo, author
Pearson Prentice Hall, 2004
Buku Teks
Schneekloth, Lynda H.
John Wiley & Sons, 1995
Buku Teks