MLA

of Strategic Services. Geography Division, United States. Office. The Netherlands: Important Inland Waterways / Drawn in Geography Division, O.S.S. O.S.S.], 1942. https://collections.library.yale.edu/catalog/15352232.

APA, 6th edition

of Strategic Services. Geography Division, U. S. O. (1942). The Netherlands: important inland waterways / drawn in Geography Division, O.S.S. [Maps]. O.S.S.], https://collections.library.yale.edu/catalog/15352232.