MLA

Bartholomew, John, and Co. Bartholomew's "Half-Inch to Mile" Map of England and Wales. Sussex / the Edinburgh Geographical Institute ; John Bartholomew. J. Bartholomew, 0AD. https://collections.library.yale.edu/catalog/15309072.

APA, 6th edition

Bartholomew, J., & C. (0 C.E.). Bartholomew's "half-inch to mile" map of England and Wales. Sussex / the Edinburgh Geographical Institute ; John Bartholomew. [Maps]. J. Bartholomew, https://collections.library.yale.edu/catalog/15309072.