F.S. Dellenbaugh carved his name in 1873 on the wall of Cave
MLA
F.S. Dellenbaugh Carved His Name in 1873 on the Wall of Cave. 0AD. https://collections.library.yale.edu/catalog/2025405.
APA, 6th edition
F.S. Dellenbaugh carved his name in 1873 on the wall of Cave. (0 C.E.). [Photographic prints, Photographs, Snapshots]. https://collections.library.yale.edu/catalog/2025405.