MLA

Sermons, Excerpts and Treatises; St. John Chrysostom; Etc. 1454. https://collections.library.yale.edu/catalog/10995122.

APA, 6th edition

Sermons, excerpts and treatises; St. John Chrysostom; etc. (1454). [Manuscripts, Medieval Flanders (Belgium) 15th century, Manuscripts, Medieval France 15th century, Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10995122.