Cite

Betts's new map of England & Wales ...

MLA

Betts's New Map of England & Wales ... John Betts, 1845. https://collections.library.yale.edu/catalog/15259778.

APA, 6th edition

Betts's new map of England & Wales ... (1845). [Maps]. John Betts, https://collections.library.yale.edu/catalog/15259778.