Cite

Clear Creek Canon. The Rocky Mountains. No. 4.

MLA

Ingersoll, Ernest, 1852-1946, Jackson, William Henry, 1843-1942. Clear Creek Canon. The Rocky Mountains. No. 4.. https://collections.library.yale.edu/catalog/2018668.

APA, 6th edition

Ingersoll, Ernest, 1852-1946, & Jackson, William Henry, 1843-1942. [Clear Creek Canon. The Rocky Mountains. No. 4.]. https://collections.library.yale.edu/catalog/2018668.