MLA

United States. Office of Strategic Services. Reproduction Branch, United States. Office of Strategic Services. Research, and Analysis Branch. Port of Wilhelmshaven. R&A, OSS, 1945. https://collections.library.yale.edu/catalog/15476498.

APA, 6th edition

United States. Office of Strategic Services. Reproduction Branch, U. S. O. of S. S. R., & Branch, A. (1945). Port of Wilhelmshaven. [Maps]. R&A, OSS, https://collections.library.yale.edu/catalog/15476498.