MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. Germany : Principal Road Construction Offices / Compiled and Drawn in the Branch of Research and Analysis, OSS. OSS, 1944. https://collections.library.yale.edu/catalog/15479671.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (1944). Germany : principal road construction offices / compiled and drawn in the Branch of Research and Analysis, OSS. [Maps]. OSS, https://collections.library.yale.edu/catalog/15479671.