MLA

Van Vechten, Carl, 1880-1964. Massachusetts. Concord. Sleepy Hollow Cemetery. Gravesite of Ralph Waldo Emerson,. Box 386 | Folder 5831. 1936 July 16. https://collections.library.yale.edu/catalog/2034131.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 386 | Folder 5831"])(1936 July 16)[Massachusetts. Concord. Sleepy Hollow Cemetery. Gravesite of Ralph Waldo Emerson,]. https://collections.library.yale.edu/catalog/2034131.