MLA

of Strategic Services. Geography Division, United States. Office. Telecommunications in the Netherlands / Compiled and Drawn in Geography Division, O.S.S. O.S.S.], 1942. https://collections.library.yale.edu/catalog/15352235.

APA, 6th edition

of Strategic Services. Geography Division, U. S. O. (1942). Telecommunications in the Netherlands / compiled and drawn in Geography Division, O.S.S. [Maps]. O.S.S.], https://collections.library.yale.edu/catalog/15352235.