MLA

Knight, Eric, 1897-1943. Portraits. Box 14, folder 304-08. 1910-35, n.d.. https://collections.library.yale.edu/catalog/2008028.

APA, 6th edition

Knight, Eric, 1897-1943. (["Box 14, folder 304-08"])(1910-35, n.d.)[Portraits]. https://collections.library.yale.edu/catalog/2008028.