Cite

Colton's Washington and Oregon.

MLA

Colton, J. H., and Co. Colton's Washington and Oregon. J.H. Colton, 0AD. https://collections.library.yale.edu/catalog/15821627.

APA, 6th edition

Colton, J. H., & C. (0 C.E.). Colton's Washington and Oregon. [Maps]. J.H. Colton, https://collections.library.yale.edu/catalog/15821627.