"Looking across the Colorado River to mouth of Paria Creek"
MLA
O'Sullivan, Timothy H., 1840-1882. "Looking across the Colorado River to mouth of Paria Creek". Box 46. ca. 1873. https://collections.library.yale.edu/catalog/2003074.
APA, 6th edition
O'Sullivan, Timothy H., 1840-1882. (["Box 46"])(ca. 1873)["Looking across the Colorado River to mouth of Paria Creek"]. https://collections.library.yale.edu/catalog/2003074.