Cite

[Photograph of Peter Palmquist with two friends]

MLA

[Photograph of Peter Palmquist with Two Friends]. 1957. https://collections.library.yale.edu/catalog/2067665.

APA, 6th edition

[Photograph of Peter Palmquist with two friends]. (1957). [Negatives]. https://collections.library.yale.edu/catalog/2067665.