MLA

Barrie, J. M. (James Matthew), 1860-1937. Autograph manuscript leaves numbered 8, 30, 31 and 32. Box 42, folder 911. circa 1904. https://collections.library.yale.edu/catalog/32313584.

APA, 6th edition

Barrie, J. M. (James Matthew), 1860-1937. (["Box 42, folder 911"])(circa 1904)[Autograph manuscript leaves numbered 8, 30, 31 and 32]. https://collections.library.yale.edu/catalog/32313584.