Cite

Castle Creek near Aspen

MLA

Ingersoll, Ernest, 1852-1946, Jackson, William Henry, 1843-1942. Castle Creek near Aspen. https://collections.library.yale.edu/catalog/2018676.

APA, 6th edition

Ingersoll, Ernest, 1852-1946, & Jackson, William Henry, 1843-1942. [Castle Creek near Aspen]. https://collections.library.yale.edu/catalog/2018676.