MLA

Wilson, Edmund, 1895-1972. Unidentified man, daguerreotype. Box 201, folder 4927. n.d.. https://collections.library.yale.edu/catalog/2005054.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 201, folder 4927"])(n.d.)[Unidentified man, daguerreotype]. https://collections.library.yale.edu/catalog/2005054.