MLA

Barrie, J. M. (James Matthew), 1860-1937. Typescripts. Box 47, folder 992. 1923. https://collections.library.yale.edu/catalog/33099971.

APA, 6th edition

Barrie, J. M. (James Matthew), 1860-1937. (["Box 47, folder 992"])(1923)[Typescripts]. https://collections.library.yale.edu/catalog/33099971.