MLA

Surveys, Canada., and Engineering Branch. Saskatchewan [Cartographic Material] / Produced in Co-Operation with the Department of Natural Resources, Province of Saskatchewan. Dept. of Mines and Resources, 1939. https://collections.library.yale.edu/catalog/15536084.

APA, 6th edition

Surveys, C., & Branch, E. (1939). Saskatchewan [cartographic material] / produced in co-operation with the Department of Natural Resources, Province of Saskatchewan. [Maps]. Dept. of Mines and Resources, https://collections.library.yale.edu/catalog/15536084.