Cite

"Fort Vancouver claim formerly James Douglas." Manuscript map

MLA

Stenzel, Franz. "Fort Vancouver Claim Formerly James Douglas." Manuscript Map. 0AD. https://collections.library.yale.edu/catalog/17232938.

APA, 6th edition

Stenzel, F. (0 C.E.). "Fort Vancouver claim formerly James Douglas." Manuscript map. https://collections.library.yale.edu/catalog/17232938.