Bradshaw's railway map of Great Britain and Ireland.
MLA
Blacklock, Henry, and Co. Bradshaw's Railway Map of Great Britain and Ireland. Henry Blacklock & Co. Ltd., Engravers and Lithographers, 0AD. https://collections.library.yale.edu/catalog/15826786.
APA, 6th edition
Blacklock, H., & C. (0 C.E.). Bradshaw's railway map of Great Britain and Ireland. [Maps]. Henry Blacklock & Co. Ltd., Engravers and Lithographers, https://collections.library.yale.edu/catalog/15826786.