MLA

Wilson, Edmund, 1895-1972. Wilson, Helen Miranda (child), with EW; Wilson, Elena; and Wilson, Reuel K.; Photographed by Sylvia Salmi. Box 200, folder 4880. 1950. https://collections.library.yale.edu/catalog/2008069.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 200, folder 4880"])(1950)[Wilson, Helen Miranda (child), with EW; Wilson, Elena; and Wilson, Reuel K.; Photographed by Sylvia Salmi]. https://collections.library.yale.edu/catalog/2008069.