MLA

Calendar for 1490 with Computational Tables and a Treatise on Arithmetic. 0AD. https://collections.library.yale.edu/catalog/11150270.

APA, 6th edition

Calendar for 1490 with computational tables and a treatise on arithmetic. (0 C.E.). [Early works to 1900, Manuscripts, Medieval Netherlands 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/11150270.