Cita APA (7a ed.)

Ury, W. (2002). Must we fight?: From the battlefield to the schoolyard, a new perspective on violent conflict and its prevention (1. ed.). Jossey-Bass.

Cita Chicago Style (17a ed.)

Ury, William. Must We Fight?: From the Battlefield to the Schoolyard, a New Perspective on Violent Conflict and Its Prevention. 1. ed. San Francisco, Calif: Jossey-Bass, 2002.

Cita MLA (8a ed.)

Ury, William. Must We Fight?: From the Battlefield to the Schoolyard, a New Perspective on Violent Conflict and Its Prevention. 1. ed. Jossey-Bass, 2002.