APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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