| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Penol Pens and Pencils | Paperback | 978-1-320-07633-3 (1-320-07633-5) | 2012 |
| Penol Pens and Pencils | Hardcover | 978-1-320-07634-0 (1-320-07634-3) | 2012 |
| Penol Pens and Pencils | " | 978-1-320-07635-7 (1-320-07635-1) | 2012 |
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