MLA
Luther, Martin, 1483-1546, author. Der gros Catechismus vnd Kinder Lere. XXXX. Richard C. Kessler Reformation Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/484mkkwkcb-cor.
APA, 6th edition
Luther, Martin, 1483-1546, author. (XXXX)[Der gros Catechismus vnd Kinder Lere]. Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/484mkkwkcb-cor.
Chicago
Luther, Martin, 1483-1546, author, Der gros Catechismus vnd Kinder Lere, XXXX, Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/484mkkwkcb-cor.