MLA

Barrie, J. M. (James Matthew), 1860-1937. Llewelyn Davies, Peter. Box 11, folder 315. 1903–1906. https://collections.library.yale.edu/catalog/17462842.

APA, 6th edition

Barrie, J. M. (James Matthew), 1860-1937. (["Box 11, folder 315"])(1903–1906)[Llewelyn Davies, Peter]. https://collections.library.yale.edu/catalog/17462842.