| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Keys to a powerful vocabulary, | 978-0-13-514992-8 | 1983 | |
| Keys to a Powerful Vocabulary Level 1 | 978-0-13-668948-5 | 1993 | Janet Maker |
| Keys to a Powerful Vocabulary: Level 1 | 978-0-13-514951-5 | 1988 | " |
| Keys to a Powerful Vocabulary Level 2 | 978-0-13-668955-3 | 1993 | " |
| Keys to a Powerful Vocabulary, Level Two | 978-0-13-514472-5 | 1990 | " |
| Keys to College Success: Reading and Study Improvement | 978-0-13-270935-4 | 1997 | " |
| Keys to College Success: Reading and Study Improvement | 978-0-13-514811-2 | 1990 | " |
| Keys to college success: Reading and study improvement | 978-0-13-515016-0 | 1985 | |
| Keys to college success: Reading and study improvement | 978-0-13-514885-3 | 1980 | |
| Keys to College Success, Reading and Study Improvement, Instructors Manual | 978-0-13-515024-5 | 1985 | |