José, Jorge V
Cambrigde University Press , 1998
Buku Teks
Ian Beardwell, Len Holden
Prentice-Hall, 2001
Buku Teks
Hungerford, Thomas W., author
Thomson Brooks/Cole, 2005
Buku Teks
Musser, Gary L., author
John Wiley & Sons, 2004
Buku Teks
Garland , 1993
Buku Teks