Cite

[Photograph of Isaac Sprague, presented as The Human Skeleton]

MLA

[Photograph of Isaac Sprague, Presented as The Human Skeleton]. 186AD. https://collections.library.yale.edu/catalog/16297417.

APA, 6th edition

[Photograph of Isaac Sprague, presented as The Human Skeleton]. (186 C.E.). [Copy prints, Photographic prints]. https://collections.library.yale.edu/catalog/16297417.