MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. Yugoslavia Administrative Divisions [Cartographic Material] / Compiled and Drawn in the Branch of Research and Analysis, OSS. Reproduction Branch, OSS, 1944. https://collections.library.yale.edu/catalog/15498808.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (1944). Yugoslavia administrative divisions [cartographic material] / compiled and drawn in the Branch of Research and Analysis, OSS. [Maps]. Reproduction Branch, OSS, https://collections.library.yale.edu/catalog/15498808.