680. [Wapli ladders]
MLA
680. [Wapli Ladders]. 0AD. https://collections.library.yale.edu/catalog/2010163.
APA, 6th edition
680. [Wapli ladders]. (0 C.E.). [Gelatin silver prints, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2010163.