Cite

[Map of Eastern Europe - showing political boundaries, railroads, military facilities].

MLA

[Map of Eastern Europe - Showing Political Boundaries, Railroads, Military Facilities]. Eckert Lith. Co., 0AD. https://collections.library.yale.edu/catalog/15259147.

APA, 6th edition

[Map of Eastern Europe - showing political boundaries, railroads, military facilities]. (0 C.E.). [Maps]. Eckert Lith. Co., https://collections.library.yale.edu/catalog/15259147.