D.W. ยท D. Watkins
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Idiom Advantage: Fluency in Speaking and Listening | 978-0-201-82527-5 (0-201-82527-9) | 1995 |
| The Idiom Adventure: Fluency in Speaking and Listening | 978-0-201-61992-8 (0-201-61992-X) | 2001 |