MLA

Survey, Canada. Topographical. Map of Rocky Mountains Park / Compiled, Drawn and Printed by the Topographical Survey of Canada. Department of the Interior, Canada, 1923. https://collections.library.yale.edu/catalog/15536059.

APA, 6th edition

Survey, C. T. (1923). Map of Rocky Mountains Park / compiled, drawn and printed by the Topographical Survey of Canada. [Maps]. Department of the Interior, Canada, https://collections.library.yale.edu/catalog/15536059.