Giles, David C., author
Routledge, 2002
Buku Teks
Shaughnessy, John J., author
McGrawhill , 1994
Buku Teks
McGuigan, F.J. (Frank J.), 1924-, author
Prentice-Hall, 1990
Buku Teks
Goodwin, C. James, author
Wiley , 2010
Buku Teks
Goodwin, C. James, author
John Wiley & Sons, 2005
Buku Teks