| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Why Kids Kill: Inside the Minds of School Shooters | Paperback | 978-0-230-10148-7 (0-230-10148-8) | 2010 |
| Why Kids Kill: Inside the Minds of School Shooters | Hardcover | 978-0-230-60802-3 (0-230-60802-7) | 2009 |
L.P. · P.P. · Peter L. · Peter Langman · Peter P.