MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. Eastern Asia and Western Pacific Ocean, Gnomonic Projection / Compiled and Drawn in the Branch of Research and Analysis, O.S.S. Reproduction Branch, O.S.S., 1943. https://collections.library.yale.edu/catalog/15502142.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (1943). Eastern Asia and western Pacific Ocean, Gnomonic projection / compiled and drawn in the Branch of Research and Analysis, O.S.S. [Maps]. Reproduction Branch, O.S.S., https://collections.library.yale.edu/catalog/15502142.