MLA

Plowden, David. Chicago, Illinois (1079-404). 1979. https://collections.library.yale.edu/catalog/2040055.

APA, 6th edition

Plowden, D. (1979). Chicago, Illinois (1079-404) [Gelatin silver prints, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2040055.