Bartholomew's political map of the New Europe, 1920.
MLA
Edinburgh Geographical Institute, John Bartholomew, and Son. Bartholomew's Political Map of the New Europe, 1920. John Bartholomew & Son, Ltd., 0AD. https://collections.library.yale.edu/catalog/15258819.
APA, 6th edition
Edinburgh Geographical Institute, J. B., & S. (0 C.E.). Bartholomew's political map of the New Europe, 1920. [Maps]. John Bartholomew & Son, Ltd., https://collections.library.yale.edu/catalog/15258819.