Hoffer, Jeffrey A., author
Addison-Wesley, 1998
Buku Teks
Hoffer, Jeffrey A., author
The Benyamin/cummings pub, 1996
Buku Teks
Whitten, Jeffrey L., author
McGraw-Hill, 2002
Buku Teks
Shelly, Gary B., author
Course Technology, 2001
Buku Teks
Whitten, Jeffrey L., author
Irwin, 1994
Buku Teks