APA (7th ed.) Citation

Langman, P. (2015). School shooters: How to recognize schoolroom and campus killers before they attack. Rowman & Littlefield.

Chicago Style (17th ed.) Citation

Langman, Peter. School Shooters: How to Recognize Schoolroom and Campus Killers Before They Attack. Lanham [u.a.]: Rowman & Littlefield, 2015.

MLA (9th ed.) Citation

Langman, Peter. School Shooters: How to Recognize Schoolroom and Campus Killers Before They Attack. Rowman & Littlefield, 2015.

Warning: These citations may not always be 100% accurate.