Martin, James
Prentice-Hall, 1988
Buku Teks
Cutts, Geoff
Alfred Waller, [date of publication not identified]
Buku Teks
Hughes, Joan K.
John Wiley & Sons, 1981
Buku Teks
Davis, William S.
Addison-Wesley, 1983
Buku Teks
Ayer, Steve J., 1956-
McGraw-Hill, 1992
Buku Teks