| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| 21st Century Skills: Learning for Life in Our Times | Paperback | 978-1-118-15706-0 (1-118-15706-0) | 2012 | Bernie Trilling |
| 21st Century Skills: Learning for Life in Our Times | Hardcover | 978-0-470-47538-6 (0-470-47538-2) | 2009 | " |