[Photograph of Peter Palmquist with hand on chin]
MLA
[Photograph of Peter Palmquist with Hand on Chin]. 1965. https://collections.library.yale.edu/catalog/2068460.
APA, 6th edition
[Photograph of Peter Palmquist with hand on chin]. (1965). [Negatives]. https://collections.library.yale.edu/catalog/2068460.