MLA

Hugh, of Fouilloy, d. 1172 or 3. Moralitates de avibus, etc. [between 1350 and 1400]. https://collections.library.yale.edu/catalog/11684569.

APA, 6th edition

Hugh, of Fouilloy, d. 1172 or 3. ([between 1350 and 1400])[Moralitates de avibus, etc]. https://collections.library.yale.edu/catalog/11684569.