Cita APA (7a ed.)

Widom, C. S. (1989). The Cycle of Violence. Science, 244(4901), 160-166. doi:10.1126/science.2704995

Cita Chicago Style (17a ed.)

Widom, Cathy Spatz. "The Cycle of Violence." Science 244, no. 4901 (1989): 160-166. https://doi.org/10.1126/science.2704995.

Cita MLA (9a ed.)

Widom, Cathy Spatz. "The Cycle of Violence." Science, vol. 244, no. 4901, 1989, pp. 160-166, https://doi.org/10.1126/science.2704995.