"Ancient Ruins in the Canon de Chelle, N.M."
MLA
O'Sullivan, Timothy H., 1840-1882. "Ancient Ruins in the Canon de Chelle, N.M.". Box 46. ca. 1873. https://collections.library.yale.edu/catalog/2003073.
APA, 6th edition
O'Sullivan, Timothy H., 1840-1882. (["Box 46"])(ca. 1873)["Ancient Ruins in the Canon de Chelle, N.M."]. https://collections.library.yale.edu/catalog/2003073.