MLA

Beinecke, Edwin J. (Edwin John), 1886-1970. Quiller-Couch, Arthur Thomas, Sir (5392-5394). Box 18, folder 470. 1897-1924. https://collections.library.yale.edu/catalog/16609828.

APA, 6th edition

Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 18, folder 470"])(1897-1924)[Quiller-Couch, Arthur Thomas, Sir (5392-5394)]. https://collections.library.yale.edu/catalog/16609828.