Cite

"Black Canon, Colorado River from Camp 8, looking above"

MLA

O'Sullivan, Timothy H., 1840-1882. "Black Canon, Colorado River from Camp 8, looking above". Box 46. ca. 1871. https://collections.library.yale.edu/catalog/2003066.

APA, 6th edition

O'Sullivan, Timothy H., 1840-1882. (["Box 46"])(ca. 1871)["Black Canon, Colorado River from Camp 8, looking above"]. https://collections.library.yale.edu/catalog/2003066.