Heinrich Denzinger, Peter Hünermann, Robert Fastiggi, et al.: Compendium of Creeds, Definitions, and Declarations on Matters of Faith and Morals (Enchiridion symbolorum…)

The standard reference for Catholic dogmatic theology. Reveals the historical development of Church doctrine through chronological arrangement of key passages from  principal magisterial source documents. Image links to free 1954 edition, which employs the pre -1963 marginal numbering system. ISBN recommendation: 0898707463