MLA

Eugippius. Vitae Sancti Severini (Fragment). 0AD. https://collections.library.yale.edu/catalog/16371291.

APA, 6th edition

E. (0 C.E.). Vitae sancti Severini (fragment). [Manuscripts, Medieval Italy 11th century, Manuscripts, Medieval Italy 15th century, Palimpsests Italy 11th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/16371291.