MLA

Wescott, Glenway, 1901-1987. GW, Lloyd Wescott, Barbara Wescott, George Montgomery, and Raymond Mortimer at Stone Blossom. Box 411, folder 4445. n.d.. https://collections.library.yale.edu/catalog/17065044.

APA, 6th edition

Wescott, Glenway, 1901-1987. (["Box 411, folder 4445"])(n.d.)[GW, Lloyd Wescott, Barbara Wescott, George Montgomery, and Raymond Mortimer at Stone Blossom]. https://collections.library.yale.edu/catalog/17065044.