MLA

Survey, Canada. Topographical. Edmonton District / Drawn and Printed at the Office of the Topographical Survey of Canada, Department of the Interior, Ottawa, June 1926. Dept. of the Interior, Topographical Survey of Canada, 1926. https://collections.library.yale.edu/catalog/15536056.

APA, 6th edition

Survey, C. T. (1926). Edmonton district / drawn and printed at the office of the Topographical Survey of Canada, Department of the Interior, Ottawa, June 1926. [Maps]. Dept. of the Interior, Topographical Survey of Canada, https://collections.library.yale.edu/catalog/15536056.