Hardyknute: a fragment ...
MLA
Hardyknute: a Fragment ... 0AD. https://collections.library.yale.edu/catalog/2040016.
APA, 6th edition
Hardyknute: a fragment ... (0 C.E.). [Devices (symbols), Illustrations, Intaglio prints, Title pages]. https://collections.library.yale.edu/catalog/2040016.