Cengage CTP · Cengage Learning
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Customer Relations & Rapport: Professional Development Series | 978-0-538-72527-9 (0-538-72527-3) | 2001 |
| Relacoes Com o Consumidor - Serie Profissional | 978-85-221-1436-8 (85-221-1436-6) | 2013 |