MLA

Survey, Canada. Topographical. Map of the Boundary between the Province of British Columbia and Yukon Territory :Bfrom Tatshenshini River to Teslin Lake. The Branch, 1909. https://collections.library.yale.edu/catalog/15536333.

APA, 6th edition

Survey, C. T. (1909). Map of the boundary between the Province of British Columbia and Yukon Territory :bfrom Tatshenshini River to Teslin Lake. [Maps]. The Branch, https://collections.library.yale.edu/catalog/15536333.