Unidentified man
MLA
Thayer, Scofield, 1889-1982. Unidentified man. Box 74, folder 1949-1951. n.d.. https://collections.library.yale.edu/catalog/17142345.
APA, 6th edition
Thayer, Scofield, 1889-1982. (["Box 74, folder 1949-1951"])(n.d.)[Unidentified man]. https://collections.library.yale.edu/catalog/17142345.