MLA

of Canada, Geological Survey. Placer Mines of Cunningham Creek / Surveyed and Drawn by Amos Bowman, Mining Engineer, Assisted by James McEvoy. Geological Survey of Canada, 0AD. https://collections.library.yale.edu/catalog/15536351.

APA, 6th edition

of Canada, G. S. (0 C.E.). Placer mines of Cunningham Creek / surveyed and drawn by Amos Bowman, mining engineer, assisted by James McEvoy. [Maps]. Geological Survey of Canada, https://collections.library.yale.edu/catalog/15536351.