Cita APA (7a ed.)

Im, E. I., Cauley, J., & Sandler, T. (1987). Cycles and substitutions in terrorist activities: A spectral approach. Kyklos, 40(2), 238-255.

Cita Chicago Style (17a ed.)

Im, Eric I., Jon Cauley, y Todd Sandler. "Cycles and Substitutions in Terrorist Activities: A Spectral Approach." Kyklos 40, no. 2 (1987): 238-255.

Cita MLA (9a ed.)

Im, Eric I., et al. "Cycles and Substitutions in Terrorist Activities: A Spectral Approach." Kyklos, vol. 40, no. 2, 1987, pp. 238-255.