MLA

of Strategic Services. Research, United States. Office, and Analysis Branch. Philippine Islands, Transportation Facilities of the Southern Visayan Islands. Reproduction Branch, OSS, 1944. https://collections.library.yale.edu/catalog/15238587.

APA, 6th edition

of Strategic Services. Research, U. S. O., & Branch, A. (1944). Philippine Islands, transportation facilities of the southern Visayan Islands. [Maps]. Reproduction Branch, OSS, https://collections.library.yale.edu/catalog/15238587.