| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Century 21: Workplace Enrichment, 7th Edition | 978-0-538-69987-7 (0-538-69987-6) | 2001 | Ann Cooper · Eileen M. Dittmar · Yvonne Morris · Barbara Norstrom |
| Exploring Cultural Diversity-Century 21 Computer Applications and Keyboarding: Text | 978-0-538-69947-1 (0-538-69947-7) | 2001 | |
| Workplace Enrichment: Activities for Skill Development | 978-0-538-43200-9 (0-538-43200-4) | 2001 | Ann Cooper · Eileen M. Dittmar · Yvonne Morris · Barbara Norstom |