| title | ISBN-13 | year of publication |
|---|---|---|
| How to make $10,000 a year extra from "lost" sales | 978-0-13-423541-7 | 1976 |
| Lloyd Purves on Closing Sales | 978-0-13-539148-8 | 1980 |
| Lloyd Purves on closing sales | 978-0-13-539130-3 | 1979 |
| Secrets of personal command power | 978-0-13-798116-8 | 1981 |