Roumania [cartographic material].
MLA
of New York, American Geographical Society. Roumania [Cartographic Material]. American Geographical Society, 1918. https://collections.library.yale.edu/catalog/15238140.
APA, 6th edition
of New York, A. G. S. (1918). Roumania [cartographic material]. [Maps]. American Geographical Society, https://collections.library.yale.edu/catalog/15238140.