Cita APA (7th ed.)

Collier, D., Brady, H. E., & Seawright, J. Sources of leverage in causal inference: Toward an alternative view of methodology.

Cita Chicago (17th ed.)

Collier, David, Henry E. Brady, i Jason Seawright. Sources of Leverage in Causal Inference: Toward an Alternative View of Methodology.

Cita MLA (9th ed.)

Collier, David, et al. Sources of Leverage in Causal Inference: Toward an Alternative View of Methodology.