MLA

Survey, Great Britain. Ordnance. [Old Series Ordnance Survey Maps of England and Wales] / Engraved at the Ordnance Map Office, Southampton ... Published by Colonel Colby ..., 0AD. https://collections.library.yale.edu/catalog/15950156.

APA, 6th edition

Survey, G. B. O. (0 C.E.). [Old series Ordnance Survey maps of England and Wales] / engraved at the Ordnance Map Office, Southampton ... [Engravings--1853-1874, Hand coloring, Topographic maps]. Published by Colonel Colby ..., https://collections.library.yale.edu/catalog/15950156.