Cita APA (7a ed.)

Roberts, S., & Butts, R. F. The individual and the nature of mass events.

Cita Chicago Style (17a ed.)

Roberts, Seth, y Robert F. Butts. The Individual and the Nature of Mass Events.

Cita MLA (8a ed.)

Roberts, Seth, y Robert F. Butts. The Individual and the Nature of Mass Events.