MLA

Thomson, Virgil, 1896-1989. Johnson, Theodate. Box 29/55, folder 24. 1934-1979. https://collections.library.yale.edu/catalog/32234473.

APA, 6th edition

Thomson, Virgil, 1896-1989. (["Box 29/55, folder 24"])(1934-1979)[Johnson, Theodate]. https://collections.library.yale.edu/catalog/32234473.