MLA

Bede, the Venerable, Saint, 673-735. Expositio In Marci Evangelium. Box. [ca. 850]. https://collections.library.yale.edu/catalog/2008129.

APA, 6th edition

Bede, the Venerable, Saint, 673-735. (["Box"])([ca. 850])[Expositio In Marci Evangelium]. https://collections.library.yale.edu/catalog/2008129.