[Letter : Ernest Hemingway to Gerald and Sara Murphy]
MLA
Hemingway, Ernest, 1899-1961. [Letter : Ernest Hemingway to Gerald and Sara Murphy]. Box 4 | Folder 68. [1926]. https://collections.library.yale.edu/catalog/11704703.
APA, 6th edition
Hemingway, Ernest, 1899-1961. (["Box 4 | Folder 68"])([1926])[[Letter : Ernest Hemingway to Gerald and Sara Murphy]]. https://collections.library.yale.edu/catalog/11704703.