MLA

Mapping, Canada., and Charting Establishment. Regina, Military City Map = Carte Militaire De La Ville [Map] / Produced by the Mapping and Charting Establishment, Department of National Defence, Canada. The Establishment : available from Canada Map Office, Dept. of Energy, Mines, and Resources, 0AD. https://collections.library.yale.edu/catalog/15536088.

APA, 6th edition

Mapping, C., & Establishment, C. (0 C.E.). Regina, military city map = Carte militaire de la ville [map] / produced by the Mapping and Charting Establishment, Department of National Defence, Canada. [Maps]. The Establishment : available from Canada Map Office, Dept. of Energy, Mines, and Resources, https://collections.library.yale.edu/catalog/15536088.