Cite

[Photograph of William Henry Johnson (c. 1842–1926), presented as Zip the Pinhead]

MLA

[Photograph of William Henry Johnson (c. 1842–1926), Presented as Zip the Pinhead]. 186AD. https://collections.library.yale.edu/catalog/16258406.

APA, 6th edition

[Photograph of William Henry Johnson (c. 1842–1926), presented as Zip the Pinhead]. (186 C.E.). [Copy prints, Photographic prints]. https://collections.library.yale.edu/catalog/16258406.