MLA

Van Vechten, Carl, 1880-1964. Cortor, Eldzier. Box 88, folder 1492. 1959 June 7. https://collections.library.yale.edu/catalog/2021984.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 88, folder 1492"])(1959 June 7)[Cortor, Eldzier]. https://collections.library.yale.edu/catalog/2021984.