
As quoted in Anderson, H. George; Stafford, J. Francis; Burgess, Joseph A., eds. (1992). The One Mediator, The Saints, and Mary. Lutherans and Catholics in Dialogue. VIII. Minneapolis: Augsburg. ISBN 0-8066-2579-1., p. 236
D. Martin Luthers Werke, Kritische Gesamtausgabe, 61 vols., (Weimar: Verlag Hermann Böhlaus Nochfolger, 1883-1983), 52:39 [hereinafter: WA] 1544
As quoted in Anderson, H. George; Stafford, J. Francis; Burgess, Joseph A., eds. (1992). The One Mediator, The Saints, and Mary. Lutherans and Catholics in Dialogue. VIII. Minneapolis: Augsburg. ISBN 0-8066-2579-1., p. 236
The Precious and Sacred Writings of Martin Luther (1905) edited by John Nicholas Lenker; republished as Sermons of Martin Luther (1996), p. 291
Weimar edition of Martin Luther's Works, English translation edited by J. Pelikan [Concordia: St. Louis], Vol. 4, 694
Letter to a Roman Catholic, July 18, 1749, The works of the Rev. John Wesley (1872), London, Wesleyan Conference Office, vol. X, p. 81. https://books.google.com/books?id=TZBKAAAAYAAJ&pg=PA81&dq=%22continued+a+pure+and+unspotted+virgin%22&hl=en&sa=X&ved=0ahUKEwjn7srt5I_NAhUUU1IKHUlzC-AQ6AEIUTAH#v=onepage&q=%22continued%20a%20pure%20and%20unspotted%20virgin%22&f=false
General sources
Martin Luther as quoted in Tappert, Theodore G. (1959). The Book of Concord: the Confessions of the Evangelical Lutheran Church. Philadelphia: Fortress Press, p. 595
Master Speaks (1967) Part 7: Bible Interpretation http://www.tparents.org/Moon-Books/sm-mast/MSTRSP-7.htm, (transcriptions of Q&A sessions in March-April 1965)
"Encyclical Letter of Our Holy Father Pius X" in The American Catholic Quarterly Review, Vol. 29. No. 114 (April 1904) p. 211