Langman, P. (2015). School shooters: How to recognize schoolroom and campus killers before they attack. Rowman & Littlefield.
Chicago-Zitierstil (17. Ausg.)Langman, Peter. School Shooters: How to Recognize Schoolroom and Campus Killers Before They Attack. Lanham [u.a.]: Rowman & Littlefield, 2015.
MLA-Zitierstil (9. Ausg.)Langman, Peter. School Shooters: How to Recognize Schoolroom and Campus Killers Before They Attack. Rowman & Littlefield, 2015.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.