Haag, Stephen, author
Irwin McGraw-Hill, 1998
Buku Referensi
Haag, Stephen, author
McGraw-Hill, 2000
Buku Teks
Haag, Stephen, author
McGraw-Hill, 2009
Buku Teks
McLeod, Raymond, author
Prentice-Hall, 2001
Buku Teks
Burch, John G., author
John Wiley & Sons, [date of publication not identified]
Buku Teks