MLA

Barrie, J. M. (James Matthew), 1860-1937. Notebook 29. Box 25, folder 751. 1906. https://collections.library.yale.edu/catalog/17472349.

APA, 6th edition

Barrie, J. M. (James Matthew), 1860-1937. (["Box 25, folder 751"])(1906)[Notebook 29]. https://collections.library.yale.edu/catalog/17472349.