Added murphy12

Author: joacorapela

docs/inference/machineLearning.bib

@@ -110,3 +110,10 @@ @book{murphyIntro22
     year={2022},
     publisher={MIT press}
 }
+
+@book{murphy12,
+  title={Machine learning: a probabilistic perspective},
+  author={Murphy, Kevin P},
+  year={2012},
+  publisher={MIT press}
+}