Thomson, Virgil
MLA
Purdy, James, 1914-2009. Thomson, Virgil. Box 17, folder 360. n.d.. https://collections.library.yale.edu/catalog/2042579.
APA, 6th edition
Purdy, James, 1914-2009. (["Box 17, folder 360"])(n.d.)[Thomson, Virgil]. https://collections.library.yale.edu/catalog/2042579.