MLA

Barrie, J. M. (James Matthew), 1860-1937. Notebook 31. Box 25, folder 753. 1908. https://collections.library.yale.edu/catalog/17472351.

APA, 6th edition

Barrie, J. M. (James Matthew), 1860-1937. (["Box 25, folder 753"])(1908)[Notebook 31]. https://collections.library.yale.edu/catalog/17472351.