
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
D. Martin Luthers Werke, Kritische Gesamtausgabe, 61 vols., (Weimar: Verlag Hermann Böhlaus Nochfolger, 1883-1983), 52:39 [hereinafter: WA] 1544
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
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
"Encyclical Letter of Our Holy Father Pius X" in The American Catholic Quarterly Review, Vol. 29. No. 114 (April 1904) p. 211
The Precious and Sacred Writings of Martin Luther (1905) edited by John Nicholas Lenker; republished as Sermons of Martin Luther (1996), p. 291
In Mary for Earth and Heaven: Essays on Mary and Ecumenism http://books.google.com/books?id=Dx4WrfzZMsoC&pg=PA116&dq=%22it+was+fitting+that+the+virgin+should+be+radiant+with+a+purity+so+great%22&hl=en&ei=ELNATrLoCIXMsQLbsvmuCQ&sa=X&oi=book_result&ct=result&resnum=1&sqi=2&ved=0CCoQ6AEwAA#v=onepage&q=%22it%20was%20fitting%20that%20the%20virgin%20should%20be%20radiant%20with%20a%20purity%20so%20great%22&f=false, 2002, William McLaughlin, Jill Pinnock, eds., Gracewing, ISBN 0852445563 ISBN 9780852445563pp. 115-116.
Weimar edition of Martin Luther's Works, English translation edited by J. Pelikan [Concordia: St. Louis], Vol. 4, 694
“It is an article of faith that Mary is Mother of the Lord and still a Virgin.”
Weimar edition of Martin Luther's Works, English translation edited by J. Pelikan [Concordia: St. Louis], Vol. 11, 319-320