MLA

Dept, Great Britain. Inter-service Topographical. Mediterranean France [Cartographic Material] : Waterways / Compiled and Drawn by I.S.T.D. G.S.G.S., 1943. https://collections.library.yale.edu/catalog/15484163.

APA, 6th edition

Dept, G. B. I.-service T. (1943). Mediterranean France [cartographic material] : waterways / compiled and drawn by I.S.T.D. [Maps]. G.S.G.S., https://collections.library.yale.edu/catalog/15484163.