MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. Romblon. G.P.O., 0AD. https://collections.library.yale.edu/catalog/15238718.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (0 C.E.). Romblon. [Maps]. G.P.O., https://collections.library.yale.edu/catalog/15238718.