MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. South Germany, U.S. Zone of Occupation, Political Boundaries / Prepared by Intelligence Section, US Group CC ; Drawn in the Branch of Research and Analysis, OSS. O.S.S., 1944. https://collections.library.yale.edu/catalog/15479697.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (1944). South Germany, U.S. zone of occupation, political boundaries / prepared by Intelligence Section, US Group CC ; drawn in the Branch of Research and Analysis, OSS. [Maps]. O.S.S., https://collections.library.yale.edu/catalog/15479697.