^"The Pastor of Hermas was one of the most popular books, if not the most popular book, in the Christian Church during the 2nd, 3rd and 4th centuries. It occupied a position analogous in some respects to Bunyan's Pilgrim's Progress in modern times." (F. Crombie, translator of Schaff, op. cit.).
^Cite error: The named reference newadvent.org was invoked but never defined (see the help page).
^Aland, Kurt; Barbara Aland (1995). The Text of the New Testament: An Introduction to the Critical Editions and to the Theory and Practice of Modern Textual Criticism, trans. Erroll F. Rhodes. Grand Rapids, Michigan: William B. Eerdmans Publishing Company. p. 107. ISBN978-0-8028-4098-1.