MLA

Lumen Animae, Part II. 0AD. https://collections.library.yale.edu/catalog/10990709.

APA, 6th edition

Lumen animae, part II. (0 C.E.). [Manuscripts, Medieval Austria 15th century, Manuscripts, Medieval Germany 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10990709.