Cita APA (7a ed.)

Langman, P. (2021). Warning signs: Identifying school shooters before they strike. Langman Psychological Associates, LLC.

Cita Chicago Style (17a ed.)

Langman, Peter. Warning Signs: Identifying School Shooters Before They Strike. Allentown: Langman Psychological Associates, LLC, 2021.

Cita MLA (8a ed.)

Langman, Peter. Warning Signs: Identifying School Shooters Before They Strike. Langman Psychological Associates, LLC, 2021.