MLA

Schlichting, Albert. Narratio De Moribus Et Imperandi Crudelitate Basilii Muscovie Magni Ducis in Anno 1569 Usque Ad 1570. 0AD. https://collections.library.yale.edu/catalog/10082354.

APA, 6th edition

Schlichting, A. (0 C.E.). Narratio de moribus et imperandi crudelitate Basilii Muscovie magni ducis in anno 1569 usque ad 1570 [Manuscripts, Medieval Italy 16th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10082354.