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(2004-12-23). Bayesian Nets and Causality: Philosophical and Computational Foundations. : Oxford University Press. Retrieved 23 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198530794.001.0001/acprof-9780198530794.
Bayesian Nets and Causality: Philosophical and Computational Foundations. : Oxford University Press, 2004-12-23. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198530794.001.0001/acprof-9780198530794.
Williamson J. Bayesian Nets and Causality: Philosophical and Computational Foundations. Oxford University Press; 2004. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198530794.001.0001/acprof-9780198530794. Accessed May 23, 2013.