MLA

Davies, Benjamin Rees. Davies's Map of the Environs of London [Cartographic Material] / Drawn & Engraved by B.R. Davies, 1858. E. Stanford, 1858. https://collections.library.yale.edu/catalog/15259874.

APA, 6th edition

Davies, B. R. (1858). Davies's map of the environs of London [cartographic material] / drawn & engraved by B.R. Davies, 1858. [Maps]. E. Stanford, https://collections.library.yale.edu/catalog/15259874.