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.
Precaución: Estas citas no son 100% exactas.