- Causal and Statistical Reasoningin The Carnegie Mellon Curriculum by Richard Scheines
- Causal Inferencein Master’s Course by Anne Boomsma
- Causal Inference Bookin Harvard School of Public Health, Department of Epidemiology by Miguel Hernán
- Causal Reasoningin The Philosophy Pages by Garth Kemerling
- Causalityby Judea Pearl
- Counterfactual Theories of Causationin The Stanford Encyclopedia of Philosophy by Peter Menzies
- d-separation applet