MLA

Garden, Mary, 1874-196, Van Vechten, Carl, 1880-1964. Canning, Cora. Box 339 | Folder 4334. 1939 June 19. https://collections.library.yale.edu/catalog/2031483.

APA, 6th edition

Garden, Mary, 1874-196, & Van Vechten, Carl, 1880-1964. (["Box 339 | Folder 4334"])(1939 June 19)[Canning, Cora]. https://collections.library.yale.edu/catalog/2031483.