MLA

Barrie, J. M. (James Matthew), 1860-1937. Synopsis. Box 43, folder 930. 1908. https://collections.library.yale.edu/catalog/32314439.

APA, 6th edition

Barrie, J. M. (James Matthew), 1860-1937. (["Box 43, folder 930"])(1908)[Synopsis]. https://collections.library.yale.edu/catalog/32314439.