Goh, Phai Cheng
Educational Publications Bureau, 1970
Buku Teks
[publisher not identified], [date of publication no identified]
Buku Teks
Malinowski, Jon C.
McGraw-Hill, 2012
Buku Teks
Thatcher, W.S.
English University Press, 1957
Buku Teks
Wheeler, James O.
John Wiley & Sons, 1986
Buku Teks