MLA
Sarcerius, Erasmus, 1501-1559. Catechismus Per Omnes Quaestiones et circumstantias, quae in iustam tractationem incidere possunt, in usum praedicatorum accuratè perlustratus ac auctus pie[que] absolutus. XXXX. Richard C. Kessler Reformation Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/375dbrv2rw-cor.
APA, 6th edition
Sarcerius, Erasmus, 1501-1559. (XXXX)[Catechismus Per Omnes Quaestiones et circumstantias, quae in iustam tractationem incidere possunt, in usum praedicatorum accuratè perlustratus ac auctus pie[que] absolutus]. Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/375dbrv2rw-cor.
Chicago
Sarcerius, Erasmus, 1501-1559, Catechismus Per Omnes Quaestiones et circumstantias, quae in iustam tractationem incidere possunt, in usum praedicatorum accuratè perlustratus ac auctus pie[que] absolutus, XXXX, Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/375dbrv2rw-cor.