Africa World Press · LAP LAMBERT Academic Publishing
| title | ISBN-13 (ISBN-10) | year of publication | |
|---|---|---|---|
| Customer Service in the 21st Century | 978-3-8465-8342-5 (3-8465-8342-1) | 2012 | |
| Socio-Economic Challenges: The African Context | 978-1-59221-268-2 (1-59221-268-9) | 2004 |