Cita APA (7a ed.)

Beck, A., & Willis, A. (1993). The terrorist threat to safe shopping. Univ. of Leicester, Centre for the Study of Publ. Order.

Cita Chicago Style (17a ed.)

Beck, Adrian, y Andrew Willis. The Terrorist Threat to Safe Shopping. Leicester: Univ. of Leicester, Centre for the Study of Publ. Order, 1993.

Cita MLA (8a ed.)

Beck, Adrian, y Andrew Willis. The Terrorist Threat to Safe Shopping. Univ. of Leicester, Centre for the Study of Publ. Order, 1993.