MLA
Luther, Martin, 1483-1546. Epistel odder vnterricht von den heyligen : an die kirch zu Erfurdt ynn gott verszamelt. 1522. Richard C. Kessler Reformation Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/511xd2552g-cor.
APA, 6th edition
Luther, Martin, 1483-1546. (1522)[Epistel odder vnterricht von den heyligen : an die kirch zu Erfurdt ynn gott verszamelt]. Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/511xd2552g-cor.
Chicago
Luther, Martin, 1483-1546, Epistel odder vnterricht von den heyligen : an die kirch zu Erfurdt ynn gott verszamelt, 1522, Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/511xd2552g-cor.