Cite

[No. 80: Photograph of hoofprints]

MLA

[No. 80: Photograph of Hoofprints]. 1915. https://collections.library.yale.edu/catalog/11680176.

APA, 6th edition

[No. 80: Photograph of hoofprints]. (1915). [Photographs, Slides (glass)]. https://collections.library.yale.edu/catalog/11680176.