| title | ISBN-13 | year of publication |
|---|---|---|
| A master guide to public speaking | 978-0-06-044574-4 | 1979 |
| How to Sell in the 1980s: Successful Selling of Products | 978-0-13-432351-0 | 1980 |
| How to Sell in the 1980s: Successful Selling of Products, Services and Ideas in a New Decade | 978-0-13-432369-5 | 1980 |
| Memory Made Easy | 978-0-13-574385-0 | 1987 |
L.M. · L. Montgomery · R. L · R. M. · R. Montgomery · Robert L. · Robert L. Montgomery · Robert M. · Robert Montgomery