Papacostas, C. S., author
Prentice-Hall, 1987
Buku Teks
Fricker, Jon D., author
Pearson/Prentice Hall, 2004
Buku Teks
Bruton, Michael J., author
Hutchinson, 1975
Buku Teks
Wright, Paul H., author
John Wiley & Sons, 1989
Buku Teks
edited by Maggie Toy
Academy Group, 1994
Buku Teks