Speculum theologiae, etc
MLA
Speculum Theologiae, Etc. 0AD. https://collections.library.yale.edu/catalog/2002797.
APA, 6th edition
Speculum theologiae, etc. (0 C.E.). [Early works to 1800, Manuscripts, Medieval Germany 14th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2002797.