MLA

Adams, Ansel, 1902-1984. People Walking. Box 1, folder 5. image created in 1943 and printed in 1985. https://collections.library.yale.edu/catalog/33222160.

APA, 6th edition

Adams, Ansel, 1902-1984. (["Box 1, folder 5"])(image created in 1943 and printed in 1985)[People Walking]. https://collections.library.yale.edu/catalog/33222160.