[Photograph of Henry Geldzahler and others at a Claes Oldenburg Happening]
MLA
[Photograph of Henry Geldzahler and Others at a Claes Oldenburg Happening]. 0AD. https://collections.library.yale.edu/catalog/2012831.
APA, 6th edition
[Photograph of Henry Geldzahler and others at a Claes Oldenburg Happening]. (0 C.E.). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2012831.