MLA

Survey, Canada. Topographical. Belcher Islands, Northwest Territories [Map] / Compiled, Drawn and Printed ... by the Topographical Survey of Canada. Topographical Survey of Canada, 1933. https://collections.library.yale.edu/catalog/15536397.

APA, 6th edition

Survey, C. T. (1933). Belcher Islands, Northwest Territories [map] / compiled, drawn and printed ... by the Topographical Survey of Canada. [Maps]. Topographical Survey of Canada, https://collections.library.yale.edu/catalog/15536397.