Cita APA (7a ed.)

Kopka, D. L. (1997). School violence: A reference handbook. ABC-CLIO.

Cita Chicago Style (17a ed.)

Kopka, Deborah L. School Violence: A Reference Handbook. Santa Barbara, Calif: ABC-CLIO, 1997.

Cita MLA (9a ed.)

Kopka, Deborah L. School Violence: A Reference Handbook. ABC-CLIO, 1997.