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I can find a list of affine Dynkin diagrams in some books but cannot find a list of affine Cartan matrices. We can write down affine Cartan matrices using affine Dynkin diagrams. But are there a list of affine Dynkin Cartan matrices in some book or paper? Thank you very much.

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By a funny coincidence, I was just reading Macdonald's paper Affine root systems and Dedekind's $\eta$-function. The appendix has a really clear and detailed description of all the affine root systems. It doesn't explicitly list Cartan matrices, but I think you should be able to work them out easily enough from this data.