Martin Luther (1931). “Early Protestant Educators: The Educational Writings of Martin Luther, John Calvin, and Other Leaders of Protestant Thought”, Ams PressInc
Martin Luther (1830). “A Selection of the Most Celebrated Sermons of Martin Luther ...: (Never Before Published in the United States.) To which is Prefixed, a Biographical History of His Life”, p.156
Martin Luther (1931). “Early Protestant Educators: The Educational Writings of Martin Luther, John Calvin, and Other Leaders of Protestant Thought”, Ams PressInc
Martin Luther, Henry Bell (Captain.), Joseph KERBY, Anton Lauterbach (1818). “The Familiar Discourses of Dr. Martin Luther ... Translated ... by Captain Henry Bell ... A New Edition, Revised ... by J. Kerby, Etc”, p.60