MLA
Luther, Martin, 1483-1546. Widder die hymelischen propheten von den Bildern vnd Sacrament rc.. XXXX. Richard C. Kessler Reformation Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/921ghx3g5r-cor.
APA, 6th edition
Luther, Martin, 1483-1546. (XXXX)[Widder die hymelischen propheten von den Bildern vnd Sacrament rc.]. Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/921ghx3g5r-cor.
Chicago
Luther, Martin, 1483-1546, Widder die hymelischen propheten von den Bildern vnd Sacrament rc., XXXX, Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/921ghx3g5r-cor.