Cita APA (7th ed.)
Nils Böckler, T. S. School Shootings: International Research, Case Studies, and Concepts for Prevention. Springer.
Cita Chicago (17th ed.)
Nils Böckler, Thorsten Seeger. School Shootings: International Research, Case Studies, and Concepts for Prevention. Nueva York, EUA: Springer.
Cita MLA (9th ed.)
Nils Böckler, Thorsten Seeger. School Shootings: International Research, Case Studies, and Concepts for Prevention. Springer.
Atenció: Aquestes cites poden no estar 100% correctes.