APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Langman, Peter F. Why Kids Kill: Inside the Minds of School Shooters. 1. publ. New York: Palgrave Macmillan, 2009.

MLA (9th ed.) Citation

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

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