Cita APA (7a ed.)

Schildkraut, J., & Muschert, G. W. (2019). Columbine, 20 years later and beyond: Lessons from tragedy. Praeger, an imprint of ABC-CLIO, LLC.

Cita Chicago Style (17a ed.)

Schildkraut, Jaclyn, y Glenn W. Muschert. Columbine, 20 Years Later and Beyond: Lessons from Tragedy. Santa Barbara, California: Praeger, an imprint of ABC-CLIO, LLC, 2019.

Cita MLA (8a ed.)

Schildkraut, Jaclyn, y Glenn W. Muschert. Columbine, 20 Years Later and Beyond: Lessons from Tragedy. Praeger, an imprint of ABC-CLIO, LLC, 2019.