MLA

of Lands, British Columbia. Dept., and Forests. Bella Coola. Preliminary Map. 1924. AMS 2. Army Map Service, 1947. https://collections.library.yale.edu/catalog/15536305.

APA, 6th edition

of Lands, B. C. D., & F. (1947). Bella Coola. Preliminary map. 1924. AMS 2. [Maps]. Army Map Service, https://collections.library.yale.edu/catalog/15536305.