| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Essentials of English Grammar: A Practical Guide to the Mastery of English | 978-0-8442-5821-8 | 1994 | |
| Essentials of English Grammar: A Quick Guide To Good English | 978-0-07-145708-8 | 2005 | |
| Handbook For Writing Proposals | 978-0-8442-3274-4 | 1995 | Robert J. Hamper |
| How To Write First-Class Letters | 978-0-8442-4099-2 | 1994 | |
| Journalism Today 1998: With Teachers Manual | 978-0-8442-0337-9 | 1998 | |
| Lo esencial de la gramatica inglesa | 978-0-07-145890-0 | 2005 | |
| Strategic Market Planning | 978-0-8442-3216-4 | 1990 | Robert J. Hamper |