| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Siguiente Paso En Mercadotecnia Directa, El | 978-970-17-0112-6 (970-17-0112-7) | 1999 |
| The Next Step in Database Marketing: Consumer Guided Marketing?: Privacy for Your Customers, Record Profits for You | 978-0-471-13359-9 (0-471-13359-0) | 1996 |
D S · Dick Schaefer · Dick Spurr · Doug Shafer · Doug Sphar · Doug Super · DS Shapiro · Richard Shaver