Cita APA (7th ed.)

Olweus, D. (1993). Bullying at school: What we know and what we can do (1a. ed.). Blackwell.

Cita Chicago (17th ed.)

Olweus, Dan. Bullying at School: What We Know and What We Can Do. 1a. ed. Malden: Blackwell, 1993.

Cita MLA (9th ed.)

Olweus, Dan. Bullying at School: What We Know and What We Can Do. 1a. ed. Blackwell, 1993.