MLA
Melanchthon, Philipp, 1497-1560. Ethicae doctrinae elementa, et enarratio libri quinti Ethicorum : additae sunt quaestiones de iuramentis, de excommunicatione, & de alijs quibusdam materijs. 1566. Richard C. Kessler Reformation Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/924wh70ttz-cor.
APA, 6th edition
Melanchthon, Philipp, 1497-1560. (1566)[Ethicae doctrinae elementa, et enarratio libri quinti Ethicorum : additae sunt quaestiones de iuramentis, de excommunicatione, & de alijs quibusdam materijs]. Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/924wh70ttz-cor.
Chicago
Melanchthon, Philipp, 1497-1560, Ethicae doctrinae elementa, et enarratio libri quinti Ethicorum : additae sunt quaestiones de iuramentis, de excommunicatione, & de alijs quibusdam materijs, 1566, Richard C. Kessler Reformation Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/924wh70ttz-cor.