MLA

of Strategic Services, United States. Office. Population Density of the Netherlands / Drawn in Geography Division, O.S.S. Office of Strategic Services, 1942. https://collections.library.yale.edu/catalog/15352230.

APA, 6th edition

of Strategic Services, U. S. O. (1942). Population density of the Netherlands / drawn in Geography Division, O.S.S. [Maps]. Office of Strategic Services, https://collections.library.yale.edu/catalog/15352230.