MLA

Van Vechten, Carl, 1880-1964. O'Keeffe, Georgia. Box 370 | Folder 5243. 1936 June 5. https://collections.library.yale.edu/catalog/2109577.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 370 | Folder 5243"])(1936 June 5)[O'Keeffe, Georgia]. https://collections.library.yale.edu/catalog/2109577.