MLA

Beinecke, Edwin J. (Edwin John), 1886-1970. New Arabian Nights, notes (6626). Box 34, folder 813. undated. https://collections.library.yale.edu/catalog/16832894.

APA, 6th edition

Beinecke, Edwin J. (Edwin John), 1886-1970. (["Box 34, folder 813"])(undated)[New Arabian Nights, notes (6626)]. https://collections.library.yale.edu/catalog/16832894.