APA (7th ed.) Citation

Langman, P., & Langman, P. F. (2009). Why kids kill: Inside the minds of school shooters (1. ed.). Palgrave Macmillan.

Chicago Style (17th ed.) Citation

Langman, Peter, and Peter F. Langman. Why Kids Kill: Inside the Minds of School Shooters. 1. ed. New York, NY [u.a.]: Palgrave Macmillan, 2009.

MLA (8th ed.) Citation

Langman, Peter, and Peter F. Langman. Why Kids Kill: Inside the Minds of School Shooters. 1. ed. Palgrave Macmillan, 2009.