Cite

Colton's Oregon, Washington, and Idaho / G.W. and C.B. Colton & Company.

MLA

G. W., et al. Colton's Oregon, Washington, and Idaho / G.W. and C.B. Colton & Company. G.W. and C.B. Colton, 1879. https://collections.library.yale.edu/catalog/15821578.

APA, 6th edition

G. W., Colton, C. B., & C. (1879). Colton's Oregon, Washington, and Idaho / G.W. and C.B. Colton & Company. [Maps]. G.W. and C.B. Colton, https://collections.library.yale.edu/catalog/15821578.