Cite

131. Excursion on mules. Riders at a quarry.

MLA

131. Excursion on Mules. Riders at a Quarry. 0AD. https://collections.library.yale.edu/catalog/2008676.

APA, 6th edition

131. Excursion on mules. Riders at a quarry. (0 C.E.). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2008676.