MLA

Pepymay, William. Fragment from an Account Book. 29AD. https://collections.library.yale.edu/catalog/9998919.

APA, 6th edition

Pepymay, W. (29 C.E.). Fragment from an account book [Account books England 15th century, Manuscripts, Medieval England 15th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/9998919.