MLA

Bartholomew, John, and Son. Bartholomew's General War Map of Europe and the Mediterranean / John Bartholomew & Co. Edinburgh Geographic Institute, 0AD. https://collections.library.yale.edu/catalog/15826783.

APA, 6th edition

Bartholomew, J., & S. (0 C.E.). Bartholomew's general war map of Europe and the Mediterranean / John Bartholomew & Co. [Maps]. Edinburgh Geographic Institute, https://collections.library.yale.edu/catalog/15826783.