| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| E-payment: The Digital Exchange | Paperback | 978-9971-69-285-8 (9971-69-285-6) | 2005 | |
| E-payment: The Digital Exchange | Hardcover | 978-9971-69-290-2 (9971-69-290-2) | 2004 | |
| The Virtual | Unbound | 978-1-930708-77-8 (1-930708-77-7) | 1998 | Magid Igbaria |