Cita APA (7th ed.)

Böckler. (2013). School Shootings (1.). Springer New York.

Cita Chicago (17th ed.)

Böckler. School Shootings. 1. Springer New York, 2013.

Cita MLA (8th ed.)

Böckler. School Shootings. 1. Springer New York, 2013.