@book{pearl2009causality,
  title = {Causality: Models, Reasoning, and Inference},
  author = {Judea Pearl},
  year = {2009},
  howpublished = {Cambridge University Press},
  url = {https://doi.org/10.1017/CBO9780511803161},
  abstract = {Foundational book on causal inference introducing structural causal models, do-calculus, and counterfactual reasoning. Unifies graphical models with potential outcomes framework. Second edition with expanded coverage.}
}