Cite

Bartholomew's "Half inch to mile" map of England & Wales. Sheet 26, Essex.

MLA

Bartholomew, J. G. (John George), 1860-1920, Edinburgh Geographical Institute. Bartholomew's "Half inch to mile" map of England & Wales. Sheet 26, Essex.. BRBL_00060. [19--?]. https://collections.library.yale.edu/catalog/15309140.

APA, 6th edition

Bartholomew, J. G. (John George), 1860-1920, & Edinburgh Geographical Institute. (["BRBL_00060"])([19--?])[Bartholomew's "Half inch to mile" map of England & Wales. Sheet 26, Essex.]. https://collections.library.yale.edu/catalog/15309140.