MLA

of Clairvaux, Pseudo-Bernard. De Interiori Domo, Etc. 0AD. https://collections.library.yale.edu/catalog/17279848.

APA, 6th edition

of Clairvaux, P.-B. (0 C.E.). De interiori domo, etc [Manuscripts, Medieval Italy 14th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/17279848.